call_disconnect
Description:
Asynchronously invokes the Disconnect D-Bus method on this.
 When the operation is finished, callback will be invoked in the thread-default main loop of the thread you are calling this
      method from (see push_thread_default). You can then call 
      call_disconnect.end to get the result of the operation.
See call_disconnect_sync for the synchronous, blocking version of this method.
Parameters:
| this | |
| cancellable | 
           A Cancellable or   | 
      
| callback | 
           A TaskReadyCallback to call when the request is satisfied or   | 
      
| user_data | 
           User data to pass to   |