126     def _message_received_(self, handler, msg):  argument
127         self.message_received(self.handler_to_client(handler), self, msg)
129     def _ping_received_(self, handler, msg):  argument
130         handler.send_pong(msg)
132     def _pong_received_(self, handler, msg):  argument
135     def _new_client_(self, handler):  argument
139             'handler': handler,
140             'address': handler.client_address
145     def _client_left_(self, handler):  argument
146         client = self.handler_to_client(handler)
158     def handler_to_client(self, handler):  argument
160             if client['handler'] == handler: