/// TextEditingValue _localValue;
  /// @override
  /// void updateEditingValueWithDeltas(List<TextEditingDelta> textEditingDeltas) {
  ///   TextEditingValue newValue = _localValue;
  ///   for (final TextEditingDelta delta in textEditingDeltas) {
  ///     newValue = delta.apply(newValue);
  ///   }
  ///   _localValue = newValue;
  /// }
  /// ```