subscribe method

RespSubscribeListener subscribe(
  1. dynamic callback(
    1. ValueUpdate update
    ), [
  2. int qos = 0
])

Subscribes the given callback to this node.

Implementation

RespSubscribeListener subscribe(
  Function(ValueUpdate update) callback, [
  int qos = 0,
]) {
  callbacks[callback] = qos;
  return RespSubscribeListener(this, callback);
}