message: add annotation for labservices
diff: "items": {
  "$ref": "#/definitions/LabServicesSkuCapabilities"
  },
  + "x-ms-identifiers": [
  + "name"
  + ],
  "readOnly": true
  },
  "locations": {
  "items": {
  "$ref": "#/definitions/LabServicesSkuCost"
  },
  + "x-ms-identifiers": [],
  "readOnly": true
  },
  "restrictions": {
  "items": {
  "$ref": "#/definitions/LabServicesSkuRestrictions"
  },
  + "x-ms-identifiers": [],
  "readOnly": true
  }
  }
  "items": {
  "$ref": "#/definitions/LabServicesSku"
  },
  + "x-ms-identifiers": [],
  "readOnly": true
  },
  "nextLink": {
  