private void HandleChildrenChanged(object?sender, CollectionPropertyChangedEventArgs e) => OnChildrenChanged(e);
/// <summary> /// Called when there is a change to either the collection's composition or a property value of one of this view model's children. /// </summary> /// <param name="e">The <see cref="CollectionPropertyChangedEventArgs"/> instance containing the event data.</param> protected virtual void OnChildrenChanged(CollectionPropertyChangedEventArgs e) { }