yuyijq/rpc — comment on commit 84e8fd8aebd5d6dbd0aa5c1a293f7e1c9057fbbb
File: src/main/java/com/yuyijq/rpc/client/Channel.java line 21
By lysu:

The return the return type of 'invoke' needs more care...

Usually, There two situation:
1. call and forget it ---like 'Void'
or open another 'server' to recieve the response...
2. call and return some thing like 'future', and later use it...