anchor.diff:          !value.isOperator &&
           value.enclosingElement != null &&
           value.enclosingElement.name != 'Object') {
  -        var lib = value.library == library.element
  -        ? library
  -        : new Library(value.library, package);
  +        var lib = value.library == library.element ? library : new Library(value.library, package);
           _inheritedMethods.add(new Method(value, lib));
         }
       }
  
positive.code:     });
      _inheritedMethods = [];
      var vs = [];
      for (var i = 0; i < cmap.size; i++) {
        vs.add(cmap.getValue(i));
      }
  
negative.code:     for (var i = 0; i < imap.size; i++) {
        vs.add(imap.getValue(i));
      }
  
      vs = vs.toSet().toList();
  
      for (var value in vs) {
        if (value != null &&
  