hasEventListener method

bool hasEventListener(
  1. String type,
  2. void listener()
)

Check if an event listener is added

Implementation

bool hasEventListener(String type, void Function() listener) {
  if (_listeners == null) {
    return false;
  }
  final listeners = _listeners;
  if (listeners?[type] != null && listeners![type]!.contains(listener)) {
    return true;
  }
  return false;
}