text: <?xml version="1.0" ?>
  <sdf version="1.4">
    <model name="grey_wall">
      <static>true</static>
      <link name="link">
        <pose>0 0 1.4 0 0 0</pose>
        <collision name="collision">
          <geometry>
            <box>
              <size>7.5 0.2 2.8</size>
            </box>
          </geometry>
        </collision>
        <visual name="visual">
          <cast_shadows>false</cast_shadows>
          <geometry>
            <box>
              <size>7.5 0.2 2.8</size>
            </box>
          </geometry>
          <material>
            <script>
              <uri>model://grey_wall/materials/scripts</uri>
              <uri>model://grey_wall/materials/textures</uri>
              <name>vrc/grey_wall</name>
            </script>
          </material>
        </visual>
      </link>
    </model>
  </sdf>
  