changeValue method

@override Future<FaderModel> changeValue(String documentId, String fieldName, num changeByThisValue)

Implementation

@override
Future<FaderModel> changeValue(
    String documentId, String fieldName, num changeByThisValue) {
  return reference
      .changeValue(documentId, fieldName, changeByThisValue)
      .then((newValue) {
    fullCache[documentId] = newValue;
    return newValue!;
  });
}