code: def _recv_flow_ok(self, method_frame):
          '''
          Receive a flow control ack from the broker.
          '''
          self.channel._active = method_frame.args.read_bit()
          if self._flow_control_cb is not None:
              self._flow_control_cb(f _recv_flow_ok(self, method_frame):
          '''
          Receive a flow control ack from the broker.
          '''
          self.channel._active = method_frame.args.read_bit()
          if self._flow_control_cb is not None:
              self._flow_control_cb()
docs: Receive a flow control ack from the broker.