UnityEditor.DragAndDropDelay.CanStartDrag C# (CSharp) Method

        public bool CanStartDrag()
        {
            return (Vector2.Distance(this.mouseDownPosition, Event.current.mousePosition) > 6f);
        }
    }

 private static void DoDragAndDrop(ListViewState listView, ListViewElement element, List <ColumnViewElement> columnViewElements, ObjectColumnGetDataFunction getDataForDraggingFunction)
 {
     if (((GUIUtility.hotControl == listView.ID) && (Event.current.type == EventType.MouseDown)) && (element.position.Contains(Event.current.mousePosition) && (Event.current.button == 0)))
     {
         DragAndDropDelay stateObject = (DragAndDropDelay)GUIUtility.GetStateObject(typeof(DragAndDropDelay), listView.ID);
         stateObject.mouseDownPosition = Event.current.mousePosition;
     }
     if (((GUIUtility.hotControl == listView.ID) && (Event.current.type == EventType.MouseDrag)) && GUIClip.visibleRect.Contains(Event.current.mousePosition))
     {
         DragAndDropDelay delay2 = (DragAndDropDelay)GUIUtility.GetStateObject(typeof(DragAndDropDelay), listView.ID);
         if (delay2.CanStartDrag())
         {
             object data = getDataForDraggingFunction?.Invoke(columnViewElements[listView.row].value);
             if (data != null)
             {
                 DragAndDrop.PrepareStartDrag();
                 DragAndDrop.objectReferences = new UnityEngine.Object[0];
                 DragAndDrop.paths            = null;
                 DragAndDrop.SetGenericData("CustomDragData", data);
                 DragAndDrop.StartDrag(columnViewElements[listView.row].name);
                 Event.current.Use();
             }
         }
     }
 }