大部分完成，还有写要解决的问题

AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/GroupDesignerItemViewModel.cs

@@ -11,10 +11,21 @@ namespace AIStudio.Wpf.DiagramDesigner
     {
         public GroupDesignerItemViewModel() : base()
         {
-            this.ClearConnectors();
+            
+        }
+
+        protected override void Init()
+        {
+            base.Init();
+
             this.IsHitTestVisible = false;
         }
 
+        protected override void InitConnector()
+        {
+       
+        }
+
         protected override void ExecuteEditCommand(object param)
         {
         }