anchor.diff:              "label": "knows",
               "type": "edge",
               "outV": 1,
  -            "hiddens": {},
               "properties": {
                   "weight": 0.5
               }
  
positive.code:     "id": 1,
      "label": "vertex",
      "type": "vertex",
      "hiddens": {},
      "properties": {
          "name": [
              {
                  "id": 0,
                  "label": "name",
                  "hiddens": {},
                  "value": "marko",
                  "properties": {}
              }
  
negative.code:                 "label": "created",
                  "type": "edge",
                  "outV": 1,
                  "properties": {
                      "@class": "java.util.HashMap",
                      "weight": [
  