support multi group for node

sample/vars/test-vars.json

@@ -3,8 +3,13 @@
   "desc": "",
   "firstid": 1,
   "export": true,
-  "group": ["Client"],
-  "import": ["vars/declare-core.json", "vars/declare-vars.json"],
+  "group": [
+    "Client"
+  ],
+  "import": [
+    "vars/declare-core.json",
+    "vars/declare-vars.json"
+  ],
   "declvar": [
     {
       "name": "target",
@@ -28,12 +33,16 @@
         "id": 4,
         "name": "FindEnemy",
         "args": {},
-        "output": ["target1"]
+        "output": [
+          "target1"
+        ]
       },
       {
         "id": 5,
         "name": "Attack",
-        "input": ["target1"]
+        "input": [
+          "target1"
+        ]
       },
       {
         "id": 6,
@@ -45,19 +54,46 @@
       {
         "id": 7,
         "name": "MoveToTarget",
-        "input": ["target"]
+        "input": [
+          "target"
+        ]
       },
       {
         "id": 8,
         "name": "Clear",
-        "output": ["test"],
+        "output": [
+          "test"
+        ],
         "children": [
           {
             "id": 9,
             "name": "Idle"
           }
         ]
+      },
+      {
+        "id": 10,
+        "name": "TestB3",
+        "args": {
+          "time": 1,
+          "open": true,
+          "check": "1",
+          "name": "1",
+          "status": "FAILURE"
+        }
+      },
+      {
+        "id": 11,
+        "name": "TestB3",
+        "args": {
+          "time": 1,
+          "open": true,
+          "check": "1",
+          "name": "1",
+          "status": "RUNNING"
+        }
       }
     ]
-  }
-}
+  },
+  "version": "1.8.0"
+}