anchor.diff:    ///
     /// The [library] determines if a private member name is visible, and does not
     /// need to be supplied for public names.
  -  @deprecated
  +  @Deprecated('Use lookupGetter2 instead')
     PropertyAccessorElement lookUpInheritedGetter(String name,
         {LibraryElement library, bool thisType = true});
   
  
positive.code:   ///   looking up getter (respectively setter) <i>m</i> in <i>S</i> with
    ///   respect to <i>L</i>. Otherwise, we say that the lookup has failed.
    /// </blockquote>
    @deprecated
    PropertyAccessorElement lookUpGetter(String name, LibraryElement library);
  
    /// Return the getter with the given [name].
  
negative.code:   ///
    /// Clients should not depend on the content of the returned value as it will
    /// be changed if doing so would improve the UX.
    @Deprecated('Use getDisplayString instead')
    String get displayName;
  
    /// Return the element representing the declaration of this type, or `null` if
  