anchor.diff:    UriReferencedElementImpl(String name, int offset) : super(name, offset);
   
     /**
  +   * Initialize for resynthesizing from kernel.
  +   */
  +  UriReferencedElementImpl.forKernel(ElementImpl enclosingElement)
  +      : super.forKernel(enclosingElement);
  +
  +  /**
      * Initialize using the given serialized information.
      */
     UriReferencedElementImpl.forSerialized(ElementImpl enclosingElement)
  
positive.code:   NonParameterVariableElementImpl.forKernel(
        ElementImpl enclosingElement, this._kernel)
        : _unlinkedVariable = null,
          super.forSerialized(enclosingElement);
  
    /**
     * Initialize a newly created variable element to have the given [name].
  
negative.code:   ExportElementImpl.forKernel(LibraryElementImpl enclosingLibrary, this._kernel)
        : _unlinkedExportPublic = null,
          _unlinkedExportNonPublic = null,
          super.forKernel(enclosingLibrary);
  
    /**
     * Initialize using the given serialized information.
  