anchor.diff:          int ifMetagenerationNotMatch
         }) {
       return new Future.sync(() {
  -      var query = new _Query(projectId)
  +      var query = new _Query()
             ..['ifMetagenerationMatch'] = ifMetagenerationMatch
             ..['ifMetagenerationNotMatch'] = ifMetagenerationNotMatch;
   
  
positive.code:         String resultSelector
        }) {
      return new Future.sync(() {
        var query = new _Query(projectId)
            ..['ifMetagenerationMatch'] = ifMetagenerationMatch
            ..['ifMetagenerationNotMatch'] = ifMetagenerationNotMatch
            ..['projection'] = projection
  
negative.code:         String selector: "*"
        }) {
      return new Future.sync(() {
        var query = new _Query()
            ..['ifMetagenerationMatch'] = ifMetagenerationMatch
            ..['ifMetagenerationNotMatch'] = ifMetagenerationNotMatch
            ..['projection'] = projection
  