anchor.diff:    render() => react.span({}, "Child element with value ${somevalue}");
   }
   
  -var InputComponentForm = react.forwardRef((props, ref) {
  +var InputComponentForm = react.forwardRef2((props, ref) {
     return react.form({
       'key': 'inputForm',
       'className': 'form-inline'
  
positive.code:       }, 'Increment child value'),
      ])
    ]);
  });
  
  var ParentComponent = react.registerComponent(() => new _ParentComponent());
  
  
negative.code:   ]);
  });
  
  var ChildComponentForm = react.forwardRef2((props, ref) {
    return react.Fragment({}, [
      react.h4({'key': 'create-child-h4'}, "ChildComponent"),
      react.form({
  