listenTo method Null safety

  1. @override
StreamSubscription<SimpleTextModel?> listenTo(
  1. String documentId,
  2. SimpleTextChanged changed,
  3. {SimpleTextErrorHandler? errorHandler}
)
override

Implementation

@override
StreamSubscription<SimpleTextModel?> listenTo(
    String documentId, SimpleTextChanged changed,
    {SimpleTextErrorHandler? errorHandler}) {
  return reference.listenTo(documentId, ((value) {
    if (value != null) {
      fullCache[value.documentID] = value;
    }
    changed(value);
  }), errorHandler: errorHandler);
}