code: def recover_async(self, requeue=False):
          '''
          Redeliver all unacknowledged messages on this channel.
  
          This method is deprecated in favour of the synchronous
          recover/recover-ok
          '''
          args = Writer()
          args.write_bit(requeue)
  
          self.send_frame(MethodFrame(self.channel_id, 60, 100, args)f recover_async(self, requeue=False):
          '''
          Redeliver all unacknowledged messages on this channel.
  
          This method is deprecated in favour of the synchronous
          recover/recover-ok
          '''
          args = Writer()
          args.write_bit(requeue)
  
          self.send_frame(MethodFrame(self.channel_id, 60, 100, args))
docs: Redeliver all unacknowledged messages on this channel.
  
          This method is deprecated in favour of the synchronous
          recover/recover-ok