public AvailableItemTree_DragHandler(XYZPlotLayerContentsControl ctrl)
 {
     _projectBrowseControl = ctrl;
 }
			public AvailableItemTree_DragHandler(XYZPlotLayerContentsControl ctrl)
			{
				_projectBrowseControl = ctrl;
			}
 public PlotItemTree_DropHandler(XYZPlotLayerContentsControl ctrl)
 {
     _projectBrowseControl = ctrl;
 }
			public PlotItemTree_DropHandler(XYZPlotLayerContentsControl ctrl)
			{
				_projectBrowseControl = ctrl;
			}