Call the msg callback function with the message.

def emit_message(self, message, log_level):
        """Call the msg callback function with the message."""
        self.log(message)
        if log_level == logging.ERROR:
            if self._error_msg_callback:
                self._error_msg_callback(message)
                return

        if log_level == logging.WARNING:
            if self._warning_msg_callback:
                self._warning_msg_callback(message)
                return

        if log_level == logging.INFO:
            if self._info_msg_callback:
                self._info_msg_callback(message)
                return

        if self._msg_callback:
            self._msg_callback(message)