UnityEditor.DockArea.ResetDragVars C# (CSharp) Method

        private static void ResetDragVars()
        {
            s_DragPane = null;
            s_DropInfo = null;
            s_PlaceholderPos = -1;
            s_DragMode = 0;
            s_OriginalDragSource = null;
        }

 private static void CheckDragWindowExists()
 {
     if (DockArea.s_DragMode == 1 && !PaneDragTab.get.m_Window)
     {
         DockArea.s_OriginalDragSource.RemoveTab(DockArea.s_DragPane);
         UnityEngine.Object.DestroyImmediate(DockArea.s_DragPane);
         PaneDragTab.get.Close();
         GUIUtility.hotControl = 0;
         DockArea.ResetDragVars();
     }
 }