protected NavigationNodeViewModel(NavigationNodeViewModel parent, ViewModelBase item, NavigationNodeViewModel lazyLoadPlaceholder)
{
this.Parent = parent;
this.Item = item;
this.lazyLoadPlaceholder = lazyLoadPlaceholder;
if (lazyLoadPlaceholder != null)
{
// A placeholder node was provided by the caller, so this is a lazy loaded node
this.Children.Add(lazyLoadPlaceholder);
}
this.IsExpanderVisible = true;
}
protected NavigationNodeViewModel(NavigationNodeViewModel parent, ViewModelBase item)
: this(parent, item, null)
{
}