anchor.diff:    } else {
       return '$base | $addition';
     }
  +}
  +
  +Object _getAnnotationInstance(DeclarationMirror declaration, Type type) {
  +  for (InstanceMirror annotation in declaration.metadata) {
  +    if (annotation.reflectee.runtimeType == type) {
  +      return annotation.reflectee;
  +    }
  +  }
  +  return null;
   }
   
   bool _hasAnnotationInstance(DeclarationMirror declaration, instance) =>
  
positive.code:         if (allGroups || group.isSolo) {
            for (_Test test in group.tests) {
              if (allTests || test.isSolo) {
                test_package.test(test.name, test.function);
              }
            }
          }
  
negative.code:   final bool isSolo;
    final String name;
    final _TestFunction function;
    final test_package.Timeout timeout;
  
    _Test(this.isSolo, this.name, this.function, this.timeout);
  }
  