// ---------------------------------------------------------------------------------
 public void UnfoldSelected()
 {
     if (Selected == null)
     {
         return;
     }
     myTreeView.Unfold(Selected);
 }
 // -------------------------------------------------------------------
 /// Unfolds all visible items.
 void UnfoldAllVisible()
 {
     database.ForEach(
         l => {
         if (ShouldShow(l))
         {
             if (!(l is LibraryTypeMember))
             {
                 myTreeView.Unfold(l);
             }
         }
     }
         );
 }