connect

Description:

public uint connect (string object_path, string method, owned MessageCallback callback)

Connect a callback handler to be evoked when message method at object_path is sent over the bus.

this	a MessageBus
object_path	the object path
method	the method
callback	function to be called when message `method` at `object_path` is sent
destroy_data	function to evoke with `user_data` as argument when `user_data` needs to be freed
user_data	user_data to use for the callback

the callback identifier