addIgnorableListener method Null safety

void addIgnorableListener(
  1. VoidCallback callback
)

Add a listener that will ignore updates made internally

Since it is made for internal use, it is not performatic to use more than one listener. Prefer outputScaleStateStream

Implementation

void addIgnorableListener(VoidCallback callback) {
  _scaleStateNotifier.addIgnorableListener(callback);
}