控制结束节点不能有连接线，控制一个节点不能同时连接同样的节点

 /*
  * @Date: 2023-10-27 09:29:48
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2023-11-15 15:56:03
+ * @LastEditTime: 2023-11-15 16:16:04
  * @FilePath: /vue-flow-editor/doc/data.js
  * @Description: 初始化结构，数据都是固定的
  */

@@ -130,7 +130,7 @@ export function dragEdge(G6, option: OptionType) {
         async _addEdge() {
             if (this.origin.targetNode) {
                 const addModel = {
-                    clazz: 'flow',
+                    class: 'flow',
                     source: this.origin.sourceNode.get('id'),
                     target: this.origin.targetNode.get('id'),
                     sourceAnchor: this.origin.sourceAnchor,