Check the current load and resume the consumer if needed.

def maybe_resume_consumer(self):
        """Check the current load and resume the consumer if needed."""
        # If we have been paused by flow control, check and see if we are
        # back within our limits.
        #
        # In order to not thrash too much, require us to have passed below
        # the resume threshold (80% by default) of each flow control setting
        # before restarting.
        if self._consumer is None or not self._consumer.is_paused:
            return

        if self.load < self.flow_control.resume_threshold:
            self._consumer.resume()
        else:
            _LOGGER.debug("Did not resume, current load is %s", self.load)