internal void DoDragDrop()
{
if (DockManager.LayoutRootPanel.RootGroupPanel?.DropMode != DropMode.None)
{
DockManager.LayoutRootPanel.RootGroupPanel?.OnDrop(_dragItem);
}
else if (DragTarget?.DropMode != DropMode.None)
{
DragTarget?.OnDrop(_dragItem);
}
IsDragging = false;
AfterDrag();
}