public TabDropHelper(T tvm, ITabControlViewModel <T> tcvm)
     : base(LambdaValueConverter.ConvertUsingCast <IDraggable, T>())
 {
     _tvm  = tvm;
     _tcvm = tcvm;
     this.DropTargetLabel = "{ISupportDrop.DisplayName}";
     this.DisplayName     = _tvm.DisplayName;
 }
 public TabControlDragHelper(ITabControlViewModel <T> tcvm)
     : base(LambdaValueConverter.ConvertUsingCast <IDraggable, T>())
 {
     _tcvm         = tcvm;
     HasDraggables = true;
 }