removeListener method

void removeListener(
  1. String key, [
  2. VoidCallback? listener
])
inherited

Implementation

void removeListener(String key, [VoidCallback? listener]) {
  if (_observers.containsKey(key))
    listener == null
        ? _observers.remove(key)
        : _observers[key]!.removeWhere((l) => l.callBack == listener);
}