static void OnParentViewModelChanged(DependencyObject d, object newValue)
{
ViewModelInitializer.SetViewModelParentViewModel(d, newValue);
ParameterAndParentViewModelSyncBehavior.AttachTo(d);
}
void OnAssociatedObjectDataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
ViewModelInitializer.SetViewModelParameter(AssociatedObject, GetParameter(AssociatedObject));
ViewModelInitializer.SetViewModelParentViewModel(AssociatedObject, GetParentViewModel(AssociatedObject));
ViewModelInitializer.SetViewModelDocumentOwner(AssociatedObject, GetDocumentOwner(AssociatedObject));
}