dequeue method

@override RunFunction? dequeue({ dynamic key, })

Implementation

@override
RunFunction? dequeue({ dynamic? key }) {
  _PriorityQueueOptions? item;

  if (key != null) {
    int idx = _map[key] != null ? _queue.indexOf(_map[key]!) : -1;
    item = idx >= 0 ? _queue.removeAt(idx) : null;
  } else {
    item = _queue.isNotEmpty
      ? _queue.removeAt(0)
      : null;
  }

  if (item?.key != null) {
    _map.remove(item?.key);
  }

  return item?.run;
}