ack method

@override Future<void> ack(int deliveryTag)

Acknowledge, removing it from the broker.

Implementation

@override
Future<void> ack(int deliveryTag) async {
  _send(1, _channel, <int>[
    ..._u16(60), ..._u16(80), // Basic.Ack
    ..._u64(deliveryTag),
    0, // this delivery only
  ]);
}