MessageReceiver Link is now open - start receiving messages.
        Will return True if operation successful and client can remain open for
        further work.

        :rtype: bool

def _client_run(self):
        """MessageReceiver Link is now open - start receiving messages.
        Will return True if operation successful and client can remain open for
        further work.

        :rtype: bool
        """
        self._connection.work()
        now = self._counter.get_current_ms()
        if self._last_activity_timestamp and not self._was_message_received:
            # If no messages are coming through, back off a little to keep CPU use low.
            time.sleep(0.05)
            if self._timeout > 0:
                timespan = now - self._last_activity_timestamp
                if timespan >= self._timeout:
                    _logger.info("Timeout reached, closing receiver.")
                    self._shutdown = True
        else:
            self._last_activity_timestamp = now
        self._was_message_received = False
        return True