void ActiveEnumerableElementFaultChanging(object sender, ElementFaultChangeEventArgs e) => ElementFaultChanging?.Invoke(this, e);
 void SourceFaultChanging(object sender, ElementFaultChangeEventArgs e) => ElementFaultChanging?.Invoke(sender, e);
 void ElementFaultChangeNotifierElementFaultChanging(object sender, ElementFaultChangeEventArgs e) => ElementFaultChanging?.Invoke(sender, e);
 protected virtual void OnElementFaultChanging(ElementFaultChangeEventArgs e) =>
 ElementFaultChanging?.Invoke(this, e);