def register_on_message(self, msg_builder):
message = msg_builder()<EOL>Log.debug("<STR_LIT>" % message.DESCRIPTOR.full_name)<EOL>self.registered_message_map[message.DESCRIPTOR.full_name] = msg_builder<EOL>
Registers protobuf message builders that this client wants to receive

        :param msg_builder: callable to create a protobuf message that this client wants to receive