class in UnityEditor.Experimental.UIElements.GraphView
/
继承自：Experimental.UIElements.Manipulator
切换到手册用于创建新边缘的操控器。
| edgeDragHelper | 引用边缘拖动 helper。 |
| target | The element that handles the interaction. |
| RegisterCallbacksOnTarget | Register event callbacks on the target visual element. |
| UnregisterCallbacksFromTarget | Unregister event callbacks on the target visual element. |