def _connection_handler(self, event_name, data, channel_name):
if channel_name in self.channels:<EOL><INDENT>self.channels[channel_name]._handle_event(event_name, data)<EOL><DEDENT>
Handle incoming data.

        :param str event_name: Name of the event.
        :param Any data: Data received.
        :param str channel_name: Name of the channel this event and data belongs to.