message: startTransaction validator
diff: "$ref": "chargingstation.json#/definitions/connector/properties/connectorId"
  },
  "tagID": {
  - "type": "string",
  - "sanitize": "mongo"
  + "$ref": "tag.json#/definitions/visualID"
  },
  "visualTagID": {
  - "type": "string",
  - "sanitize": "mongo"
  + "$ref": "tag.json#/definitions/visualID"
  }
  }
  },
  