D-BusでSystemdプロセスの開始時刻を取る

# Systemd サービスのオブジェクトパスを確認する。
```shell-session

# dbus-send --print-reply \
--system --dest=org.freedesktop.systemd1 \
/org/freedesktop/systemd1 \
--type=method_call \
org.freedesktop.systemd1.Manager.GetUnit \
string:XYZ.service
```
### 実行結果

```
method return time=1602515524.566622 sender=:1.1289 -> destination=:1.1436 serial=362625 reply_serial=2
   object path "/org/freedesktop/systemd1/unit/XYZ_2eservice"
```

オブジェクトパスは、`/org/freedesktop/systemd1/unit/XYZ_2eservice`であることが分かる。

# Introspect APIでオブジェクトの一覧を確認する。
```shell-session
dbus-send --print-reply \
--system --dest=org.freedesktop.systemd1 \
/org/freedesktop/systemd1/unit/XYZ_2eservice \
--type=method_call \
org.freedesktop.DBus.Introspectable.Introspect
```

### 実行結果
XML形式の値を含む返り値が得られる。

```xml
<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
<node>
 <interface name="org.freedesktop.DBus.Peer">
  <method name="Ping"/>
  <method name="GetMachineId">
   <arg type="s" name="machine_uuid" direction="out"/>
  </method>
 </interface>
 <interface name="org.freedesktop.DBus.Introspectable">
  <method name="Introspect">
   <arg name="data" type="s" direction="out"/>
  </method>
 </interface>
 <interface name="org.freedesktop.DBus.Properties">
  <method name="Get">
   <arg name="interface" direction="in" type="s"/>
   <arg name="property" direction="in" type="s"/>
   <arg name="value" direction="out" type="v"/>
  </method>
  <method name="GetAll">
   <arg name="interface" direction="in" type="s"/>
   <arg name="properties" direction="out" type="a{sv}"/>
  </method>
  <method name="Set">
   <arg name="interface" direction="in" type="s"/>
   <arg name="property" direction="in" type="s"/>
   <arg name="value" direction="in" type="v"/>
  </method>
  <signal name="PropertiesChanged">
   <arg type="s" name="interface"/>
   <arg type="a{sv}" name="changed_properties"/>
   <arg type="as" name="invalidated_properties"/>
  </signal>
 </interface>
 <interface name="org.freedesktop.systemd1.Service">
  <property name="Type" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Restart" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="PIDFile" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="NotifyAccess" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RestartUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="TimeoutStartUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="TimeoutStopUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="TimeoutAbortUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="RuntimeMaxUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="WatchdogUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="WatchdogTimestamp" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="WatchdogTimestampMonotonic" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="RootDirectoryStartOnly" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RemainAfterExit" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="GuessMainPID" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RestartPreventExitStatus" type="(aiai)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RestartForceExitStatus" type="(aiai)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="SuccessExitStatus" type="(aiai)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="MainPID" type="u" access="read">
  </property>
  <property name="ControlPID" type="u" access="read">
  </property>
  <property name="BusName" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="FileDescriptorStoreMax" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="NFileDescriptorStore" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StatusText" type="s" access="read">
  </property>
  <property name="StatusErrno" type="i" access="read">
  </property>
  <property name="Result" type="s" access="read">
  </property>
  <property name="ReloadResult" type="s" access="read">
  </property>
  <property name="CleanResult" type="s" access="read">
  </property>
  <property name="USBFunctionDescriptors" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="USBFunctionStrings" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="UID" type="u" access="read">
  </property>
  <property name="GID" type="u" access="read">
  </property>
  <property name="NRestarts" type="u" access="read">
  </property>
  <property name="OOMPolicy" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="ExecMainStartTimestamp" type="t" access="read">
  </property>
  <property name="ExecMainStartTimestampMonotonic" type="t" access="read">
  </property>
  <property name="ExecMainExitTimestamp" type="t" access="read">
  </property>
  <property name="ExecMainExitTimestampMonotonic" type="t" access="read">
  </property>
  <property name="ExecMainPID" type="u" access="read">
  </property>
  <property name="ExecMainCode" type="i" access="read">
  </property>
  <property name="ExecMainStatus" type="i" access="read">
  </property>
  <property name="ExecCondition" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecConditionEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStartPre" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStartPreEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStart" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStartEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStartPost" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStartPostEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecReload" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecReloadEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStop" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStopEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStopPost" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStopPostEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="Slice" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="ControlGroup" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryCurrent" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUUsageNSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="EffectiveCPUs" type="ay" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="EffectiveMemoryNodes" type="ay" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="TasksCurrent" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPIngressBytes" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPIngressPackets" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPEgressBytes" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPEgressPackets" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOReadBytes" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOReadOperations" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOWriteBytes" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOWriteOperations" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <method name="GetProcesses">
   <arg type="a(sus)" direction="out"/>
  </method>
  <method name="AttachProcesses">
   <arg type="s" direction="in"/>
   <arg type="au" direction="in"/>
  </method>
  <property name="Delegate" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="DelegateControllers" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUAccounting" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StartupCPUWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUShares" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StartupCPUShares" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUQuotaPerSecUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUQuotaPeriodUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="AllowedCPUs" type="ay" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="AllowedMemoryNodes" type="ay" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOAccounting" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StartupIOWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IODeviceWeight" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOReadBandwidthMax" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOWriteBandwidthMax" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOReadIOPSMax" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOWriteIOPSMax" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IODeviceLatencyTargetUSec" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="BlockIOAccounting" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="BlockIOWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StartupBlockIOWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="BlockIODeviceWeight" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="BlockIOReadBandwidth" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="BlockIOWriteBandwidth" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryAccounting" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="DefaultMemoryLow" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="DefaultMemoryMin" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryMin" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryLow" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryHigh" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryMax" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemorySwapMax" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryLimit" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="DevicePolicy" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="DeviceAllow" type="a(ss)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="TasksAccounting" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="TasksMax" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPAccounting" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPAddressAllow" type="a(iayu)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPAddressDeny" type="a(iayu)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPIngressFilterPath" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPEgressFilterPath" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="DisableControllers" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="Environment" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="EnvironmentFiles" type="a(sb)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="PassEnvironment" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="UnsetEnvironment" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="UMask" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitCPU" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitCPUSoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitFSIZE" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitFSIZESoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitDATA" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitDATASoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitSTACK" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitSTACKSoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitCORE" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitCORESoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitRSS" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitRSSSoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitNOFILE" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitNOFILESoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitAS" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitASSoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitNPROC" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitNPROCSoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitMEMLOCK" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitMEMLOCKSoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitLOCKS" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitLOCKSSoft" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitSIGPENDING" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LimitSIGPENDINGSoft" type="t" access="read">
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="LimitNICESoft" type="t" access="read">
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  <property name="LimitRTTIME" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="LimitRTTIMESoft" type="t" access="read">
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="RootImage" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StandardInput" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StandardInputFileDescriptorName" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StandardInputData" type="ay" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StandardOutput" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StandardOutputFileDescriptorName" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StandardError" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StandardErrorFileDescriptorName" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="TTYPath" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="TTYReset" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="TTYVHangup" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="TTYVTDisallocate" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SyslogPriority" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SyslogIdentifier" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SyslogLevelPrefix" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SyslogLevel" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SyslogFacility" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="LogLevelMax" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="LogRateLimitBurst" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="LogExtraFields" type="aay" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SecureBits" type="i" access="read">
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  <property name="AmbientCapabilities" type="t" access="read">
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  <property name="User" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="Group" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="DynamicUser" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SupplementaryGroups" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="PAMName" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="MountFlags" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="PrivateDevices" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ProtectKernelTunables" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ProtectKernelModules" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ProtectKernelLogs" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ProtectControlGroups" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="PrivateNetwork" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="PrivateUsers" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="PrivateMounts" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ProtectHome" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ProtectSystem" type="s" access="read">
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  <property name="SameProcessGroup" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="UtmpIdentifier" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="UtmpMode" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SELinuxContext" type="(bs)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="AppArmorProfile" type="(bs)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SmackProcessLabel" type="(bs)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="IgnoreSIGPIPE" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="NoNewPrivileges" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SystemCallFilter" type="(bas)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SystemCallArchitectures" type="as" access="read">
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  <property name="SystemCallErrorNumber" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="Personality" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="LockPersonality" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="RestrictAddressFamilies" type="(bas)" access="read">
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  <property name="RuntimeDirectoryPreserve" type="s" access="read">
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  <property name="RuntimeDirectoryMode" type="u" access="read">
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  <property name="RuntimeDirectory" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StateDirectoryMode" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StateDirectory" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="CacheDirectoryMode" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="CacheDirectory" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="LogsDirectoryMode" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="LogsDirectory" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ConfigurationDirectoryMode" type="u" access="read">
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  <property name="ConfigurationDirectory" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="TimeoutCleanUSec" type="t" access="read">
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  <property name="MemoryDenyWriteExecute" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="RestrictRealtime" type="b" access="read">
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  <property name="RestrictSUIDSGID" type="b" access="read">
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  <property name="RestrictNamespaces" type="t" access="read">
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  <property name="BindPaths" type="a(ssbt)" access="read">
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  <property name="TemporaryFileSystem" type="a(ss)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="MountAPIVFS" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="KeyringMode" type="s" access="read">
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  <property name="ProtectHostname" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="NetworkNamespacePath" type="s" access="read">
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  <property name="KillMode" type="s" access="read">
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  <property name="KillSignal" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="RestartKillSignal" type="i" access="read">
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  <property name="FinalKillSignal" type="i" access="read">
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  <property name="SendSIGKILL" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SendSIGHUP" type="b" access="read">
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  <property name="WatchdogSignal" type="i" access="read">
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 </interface>
 <interface name="org.freedesktop.systemd1.Unit">
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  <property name="Requires" type="as" access="read">
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  <property name="BindsTo" type="as" access="read">
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ConflictedBy" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="Before" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="After" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="OnFailure" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="Triggers" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="TriggeredBy" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="PropagatesReloadTo" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ReloadPropagatedFrom" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="JoinsNamespaceOf" type="as" access="read">
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="Documentation" type="as" access="read">
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  <property name="Description" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="LoadState" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ActiveState" type="s" access="read">
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  <property name="SourcePath" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="DropInPaths" type="as" access="read">
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  <property name="UnitFileState" type="s" access="read">
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  <property name="StateChangeTimestamp" type="t" access="read">
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  <property name="StateChangeTimestampMonotonic" type="t" access="read">
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  <property name="InactiveExitTimestamp" type="t" access="read">
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  <property name="InactiveExitTimestampMonotonic" type="t" access="read">
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  <property name="ActiveEnterTimestamp" type="t" access="read">
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  <property name="ActiveEnterTimestampMonotonic" type="t" access="read">
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  <property name="ActiveExitTimestamp" type="t" access="read">
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  <property name="CanReload" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="CanIsolate" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="CanClean" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Job" type="(uo)" access="read">
  </property>
  <property name="StopWhenUnneeded" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RefuseManualStart" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RefuseManualStop" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="AllowIsolate" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="DefaultDependencies" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="OnFailureJobMode" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="IgnoreOnIsolate" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="NeedDaemonReload" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="JobTimeoutUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="JobRunningTimeoutUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="JobTimeoutAction" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="JobTimeoutRebootArgument" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="ConditionResult" type="b" access="read">
  </property>
  <property name="AssertResult" type="b" access="read">
  </property>
  <property name="ConditionTimestamp" type="t" access="read">
  </property>
  <property name="ConditionTimestampMonotonic" type="t" access="read">
  </property>
  <property name="AssertTimestamp" type="t" access="read">
  </property>
  <property name="AssertTimestampMonotonic" type="t" access="read">
  </property>
  <property name="Conditions" type="a(sbbsi)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="Asserts" type="a(sbbsi)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="LoadError" type="(ss)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Transient" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Perpetual" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="StartLimitIntervalUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="StartLimitBurst" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="StartLimitAction" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="FailureAction" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="FailureActionExitStatus" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="SuccessAction" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="SuccessActionExitStatus" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RebootArgument" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="InvocationID" type="ay" access="read">
  </property>
  <property name="CollectMode" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Refs" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <method name="Start">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="Stop">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="Reload">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="Restart">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="TryRestart">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="ReloadOrRestart">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="ReloadOrTryRestart">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="EnqueueJob">
   <arg type="s" direction="in"/>
   <arg type="s" direction="in"/>
   <arg type="u" direction="out"/>
   <arg type="o" direction="out"/>
   <arg type="s" direction="out"/>
   <arg type="o" direction="out"/>
   <arg type="s" direction="out"/>
   <arg type="a(uosos)" direction="out"/>
  </method>
  <method name="Kill">
   <arg type="s" direction="in"/>
   <arg type="i" direction="in"/>
  </method>
  <method name="ResetFailed">
  </method>
  <method name="SetProperties">
   <arg type="b" direction="in"/>
   <arg type="a(sv)" direction="in"/>
  </method>
  <method name="Ref">
  </method>
  <method name="Unref">
  </method>
  <method name="Clean">
   <arg type="as" direction="in"/>
  </method>
 </interface>
</node>
```


<details><summary>素のリターン値を見る。</summary><div>

```
method return time=1602546304.528745 sender=:1.1289 -> destination=:1.1466 serial=442609 reply_serial=2
   string "<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
<node>
 <interface name="org.freedesktop.DBus.Peer">
  <method name="Ping"/>
  <method name="GetMachineId">
   <arg type="s" name="machine_uuid" direction="out"/>
  </method>
 </interface>
 <interface name="org.freedesktop.DBus.Introspectable">
  <method name="Introspect">
   <arg name="data" type="s" direction="out"/>
  </method>
 </interface>
 <interface name="org.freedesktop.DBus.Properties">
  <method name="Get">
   <arg name="interface" direction="in" type="s"/>
   <arg name="property" direction="in" type="s"/>
   <arg name="value" direction="out" type="v"/>
  </method>
  <method name="GetAll">
   <arg name="interface" direction="in" type="s"/>
   <arg name="properties" direction="out" type="a{sv}"/>
  </method>
  <method name="Set">
   <arg name="interface" direction="in" type="s"/>
   <arg name="property" direction="in" type="s"/>
   <arg name="value" direction="in" type="v"/>
  </method>
  <signal name="PropertiesChanged">
   <arg type="s" name="interface"/>
   <arg type="a{sv}" name="changed_properties"/>
   <arg type="as" name="invalidated_properties"/>
  </signal>
 </interface>
 <interface name="org.freedesktop.systemd1.Service">
  <property name="Type" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Restart" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="PIDFile" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="NotifyAccess" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RestartUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="TimeoutStartUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="TimeoutStopUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="TimeoutAbortUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="RuntimeMaxUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="WatchdogUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="WatchdogTimestamp" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="WatchdogTimestampMonotonic" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="RootDirectoryStartOnly" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RemainAfterExit" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="GuessMainPID" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RestartPreventExitStatus" type="(aiai)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RestartForceExitStatus" type="(aiai)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="SuccessExitStatus" type="(aiai)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="MainPID" type="u" access="read">
  </property>
  <property name="ControlPID" type="u" access="read">
  </property>
  <property name="BusName" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="FileDescriptorStoreMax" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="NFileDescriptorStore" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StatusText" type="s" access="read">
  </property>
  <property name="StatusErrno" type="i" access="read">
  </property>
  <property name="Result" type="s" access="read">
  </property>
  <property name="ReloadResult" type="s" access="read">
  </property>
  <property name="CleanResult" type="s" access="read">
  </property>
  <property name="USBFunctionDescriptors" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="USBFunctionStrings" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="UID" type="u" access="read">
  </property>
  <property name="GID" type="u" access="read">
  </property>
  <property name="NRestarts" type="u" access="read">
  </property>
  <property name="OOMPolicy" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="ExecMainStartTimestamp" type="t" access="read">
  </property>
  <property name="ExecMainStartTimestampMonotonic" type="t" access="read">
  </property>
  <property name="ExecMainExitTimestamp" type="t" access="read">
  </property>
  <property name="ExecMainExitTimestampMonotonic" type="t" access="read">
  </property>
  <property name="ExecMainPID" type="u" access="read">
  </property>
  <property name="ExecMainCode" type="i" access="read">
  </property>
  <property name="ExecMainStatus" type="i" access="read">
  </property>
  <property name="ExecCondition" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecConditionEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStartPre" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStartPreEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStart" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStartEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStartPost" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStartPostEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecReload" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecReloadEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStop" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStopEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStopPost" type="a(sasbttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="ExecStopPostEx" type="a(sasasttttuii)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="Slice" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="ControlGroup" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryCurrent" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUUsageNSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="EffectiveCPUs" type="ay" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="EffectiveMemoryNodes" type="ay" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="TasksCurrent" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPIngressBytes" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPIngressPackets" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPEgressBytes" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IPEgressPackets" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOReadBytes" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOReadOperations" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOWriteBytes" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOWriteOperations" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <method name="GetProcesses">
   <arg type="a(sus)" direction="out"/>
  </method>
  <method name="AttachProcesses">
   <arg type="s" direction="in"/>
   <arg type="au" direction="in"/>
  </method>
  <property name="Delegate" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="DelegateControllers" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUAccounting" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StartupCPUWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUShares" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StartupCPUShares" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUQuotaPerSecUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="CPUQuotaPeriodUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="AllowedCPUs" type="ay" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="AllowedMemoryNodes" type="ay" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOAccounting" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StartupIOWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IODeviceWeight" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOReadBandwidthMax" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOWriteBandwidthMax" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOReadIOPSMax" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IOWriteIOPSMax" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="IODeviceLatencyTargetUSec" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="BlockIOAccounting" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="BlockIOWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StartupBlockIOWeight" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="BlockIODeviceWeight" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="BlockIOReadBandwidth" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="BlockIOWriteBandwidth" type="a(st)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryAccounting" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="DefaultMemoryLow" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="DefaultMemoryMin" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryMin" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryLow" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryHigh" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryMax" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemorySwapMax" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="MemoryLimit" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="DevicePolicy" type="s" access="read">
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  <property name="StandardInput" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StandardError" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="TTYPath" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="TTYReset" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="TTYVHangup" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="TTYVTDisallocate" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SyslogPriority" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="SyslogFacility" type="i" access="read">
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  <property name="DynamicUser" type="b" access="read">
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  <property name="PrivateDevices" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ProtectKernelTunables" type="b" access="read">
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  <property name="ProtectKernelModules" type="b" access="read">
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  <property name="ProtectKernelLogs" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ProtectControlGroups" type="b" access="read">
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  <property name="PrivateNetwork" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="PrivateUsers" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="PrivateMounts" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ProtectHome" type="s" access="read">
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  <property name="ProtectSystem" type="s" access="read">
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  <property name="SameProcessGroup" type="b" access="read">
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  <property name="UtmpIdentifier" type="s" access="read">
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  <property name="SELinuxContext" type="(bs)" access="read">
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  <property name="AppArmorProfile" type="(bs)" access="read">
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  <property name="SmackProcessLabel" type="(bs)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="Personality" type="s" access="read">
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  <property name="LockPersonality" type="b" access="read">
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  <property name="RestrictAddressFamilies" type="(bas)" access="read">
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  <property name="RuntimeDirectoryPreserve" type="s" access="read">
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  <property name="RuntimeDirectory" type="as" access="read">
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  <property name="StateDirectoryMode" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="StateDirectory" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="CacheDirectoryMode" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="CacheDirectory" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="LogsDirectoryMode" type="u" access="read">
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  <property name="LogsDirectory" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ConfigurationDirectoryMode" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ConfigurationDirectory" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="TimeoutCleanUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="MemoryDenyWriteExecute" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RestrictRealtime" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RestrictSUIDSGID" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RestrictNamespaces" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="BindPaths" type="a(ssbt)" access="read">
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  <property name="BindReadOnlyPaths" type="a(ssbt)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="TemporaryFileSystem" type="a(ss)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="MountAPIVFS" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="KeyringMode" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
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  <property name="ProtectHostname" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="NetworkNamespacePath" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="KillMode" type="s" access="read">
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  </property>
  <property name="KillSignal" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RestartKillSignal" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="FinalKillSignal" type="i" access="read">
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  </property>
  <property name="SendSIGKILL" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="SendSIGHUP" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="WatchdogSignal" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
 </interface>
 <interface name="org.freedesktop.systemd1.Unit">
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  <property name="Names" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Following" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="Requires" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Requisite" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Wants" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="BindsTo" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="PartOf" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RequiredBy" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RequisiteOf" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="WantedBy" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="BoundBy" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="ConsistsOf" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Conflicts" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="ConflictedBy" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Before" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="After" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="OnFailure" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Triggers" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="TriggeredBy" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="PropagatesReloadTo" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="ReloadPropagatedFrom" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="JoinsNamespaceOf" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RequiresMountsFor" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Documentation" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Description" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="LoadState" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="ActiveState" type="s" access="read">
  </property>
  <property name="SubState" type="s" access="read">
  </property>
  <property name="FragmentPath" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="SourcePath" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="DropInPaths" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="UnitFileState" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="UnitFilePreset" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <property name="StateChangeTimestamp" type="t" access="read">
  </property>
  <property name="StateChangeTimestampMonotonic" type="t" access="read">
  </property>
  <property name="InactiveExitTimestamp" type="t" access="read">
  </property>
  <property name="InactiveExitTimestampMonotonic" type="t" access="read">
  </property>
  <property name="ActiveEnterTimestamp" type="t" access="read">
  </property>
  <property name="ActiveEnterTimestampMonotonic" type="t" access="read">
  </property>
  <property name="ActiveExitTimestamp" type="t" access="read">
  </property>
  <property name="ActiveExitTimestampMonotonic" type="t" access="read">
  </property>
  <property name="InactiveEnterTimestamp" type="t" access="read">
  </property>
  <property name="InactiveEnterTimestampMonotonic" type="t" access="read">
  </property>
  <property name="CanStart" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="CanStop" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="CanReload" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="CanIsolate" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="CanClean" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Job" type="(uo)" access="read">
  </property>
  <property name="StopWhenUnneeded" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RefuseManualStart" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RefuseManualStop" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="AllowIsolate" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="DefaultDependencies" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="OnFailureJobMode" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="IgnoreOnIsolate" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="NeedDaemonReload" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="JobTimeoutUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="JobRunningTimeoutUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="JobTimeoutAction" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="JobTimeoutRebootArgument" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="ConditionResult" type="b" access="read">
  </property>
  <property name="AssertResult" type="b" access="read">
  </property>
  <property name="ConditionTimestamp" type="t" access="read">
  </property>
  <property name="ConditionTimestampMonotonic" type="t" access="read">
  </property>
  <property name="AssertTimestamp" type="t" access="read">
  </property>
  <property name="AssertTimestampMonotonic" type="t" access="read">
  </property>
  <property name="Conditions" type="a(sbbsi)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="Asserts" type="a(sbbsi)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="invalidates"/>
  </property>
  <property name="LoadError" type="(ss)" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Transient" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Perpetual" type="b" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="StartLimitIntervalUSec" type="t" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="StartLimitBurst" type="u" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="StartLimitAction" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="FailureAction" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="FailureActionExitStatus" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="SuccessAction" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="SuccessActionExitStatus" type="i" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="RebootArgument" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="InvocationID" type="ay" access="read">
  </property>
  <property name="CollectMode" type="s" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
  </property>
  <property name="Refs" type="as" access="read">
   <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="false"/>
  </property>
  <method name="Start">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="Stop">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="Reload">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="Restart">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="TryRestart">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="ReloadOrRestart">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="ReloadOrTryRestart">
   <arg type="s" direction="in"/>
   <arg type="o" direction="out"/>
  </method>
  <method name="EnqueueJob">
   <arg type="s" direction="in"/>
   <arg type="s" direction="in"/>
   <arg type="u" direction="out"/>
   <arg type="o" direction="out"/>
   <arg type="s" direction="out"/>
   <arg type="o" direction="out"/>
   <arg type="s" direction="out"/>
   <arg type="a(uosos)" direction="out"/>
  </method>
  <method name="Kill">
   <arg type="s" direction="in"/>
   <arg type="i" direction="in"/>
  </method>
  <method name="ResetFailed">
  </method>
  <method name="SetProperties">
   <arg type="b" direction="in"/>
   <arg type="a(sv)" direction="in"/>
  </method>
  <method name="Ref">
  </method>
  <method name="Unref">
  </method>
  <method name="Clean">
   <arg type="as" direction="in"/>
  </method>
 </interface>
</node>
"
```

</div></details>


# プロパティの取得

[org.freedesktop.systemd1のドキュメント](https://www.freedesktop.org/software/systemd/man/org.freedesktop.systemd1.html)によると
ExecMainStartTimestampはサービスの開始時刻（UNIX TIMEのマイクロ秒経過値）。

```sh
dbus-send --print-reply \
--system --dest=org.freedesktop.systemd1 \
/org/freedesktop/systemd1/unit/XYZ_2eservice \
--type=method_call \
org.freedesktop.DBus.Properties.Get \
string:org.freedesktop.systemd1.Service string:ExecMainStartTimestamp

```

### 実行結果
```
method return time=1602546654.460332 sender=:1.1289 -> destination=:1.1467 serial=443511 reply_serial=2
   variant       uint64 160216815926145
```

これにより、起動時刻がマイクロ秒精度で得られる。

# 参考サイト様
## [D-Bus のはなし](https://www.silex.jp/blog/wireless/2017/01/d-bus.html)
一番わかりやすかった。

## [D-Bus仕様](https://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-overview)

## 余談
### そもそもの動機
SystemdのCPU使用率を出したかった。

### CPU時間は割とすぐ解決した
systemdのUnitファイルの`CPUAccounting=Yes`とすることで、`systemctl status`の出力項目にCPU時間が出力されるようになった。
が使用率は出なかった。

### CPU使用率の計算式を考えた
> CPU時間 / (現在時刻 - プロセス開始時刻) = CPU使用率

#### CPU時間
systemdのUnitファイルの`CPUAccounting=Yes`とすることで、疑似ファイル(/sys/fs/cgroup/cpu,cpuacct/system.slice/XYZ.service/cpuacct.usage)にCPU時間（ナノ秒単位）が出力されることを把握。
[参考ドキュメント RHELだが・・・](https://access.redhat.com/documentation/ja-jp/red_hat_enterprise_linux/6/html/resource_management_guide/sec-cpuacct)

#### 現在時刻
`date +%s%N`でUNIX TIMEのナノ秒経過値を出力できることを確認。

#### プロセス開始時刻だけなかなか見つからず。

### D-Busになぜたどり着いたか
zabbix-agent2において、プロセス開始時間などの`systemd.unit.info`アイテムがD-Bus APIをコールすることで取得しているという[ドキュメント](https://www.zabbix.com/documentation/current/manual/config/items/itemtypes/zabbix_agent/zabbix_agent2)を読んだため。
`systemctl status`で取れるのだが、文字列のトリミングが必要なのでダサかった。
結論としては、zabbix-agent2で取った値でも全然問題ない。

### 最終的な実行コマンド

```sh
bc -l <<<  "`cat /sys/fs/cgroup/cpu,cpuacct/system.slice/XYZ.service/cpuacct.usage` \
/ (`date +%s%N` -  `dbus-send --print-reply --system --dest=org.freedesktop.systemd1 \
/org/freedesktop/systemd1/unit/XYZ_2eservice --type=method_call \
org.freedesktop.DBus.Properties.Get \
string:org.freedesktop.systemd1.Service string:ExecMainStartTimestamp \
 | awk 'NR==2{print $3}' `* 1000)"

```

### 実行結果
```
.00069189842267347429
```

### time付き
```
real	0m0.010s
user	0m0.006s
sys	    0m0.005s
```

### オブジェクトパスの変わる条件
`systemctl restart`してもオブジェクトパスは変わらなかった。
`systemctl stop`および`systemctl start`を行っても、オブジェクトパスは変わらなかった。
UnitファイルのDiscriptionを変えて、`systemctl daemon-reload`しても変わらなかった。

何に基づいて決まるのかは、暇があれば調べる。