anchor.diff:          offset = 0;
         }
         IndexSyntheticElementKind kind = getIndexElementKind(element);
  -      return new _ElementInfo(element, unitId, offset, kind);
  +      return new _ElementInfo(unitId, offset, kind);
       });
     }
   
  
positive.code:    */
    int id;
  
    _ElementInfo(this.element, this.unitId, this.offset, this.kind);
  }
  
  /**
  
negative.code:  */
  class _ElementInfo {
    /**
     * The identifier of the [CompilationUnitElement] containing this element.
     */
    final int unitId;
  