anchor.diff:  
   var ParrentComponent = react.registerComponent(() => new _ParrentComponent());
   class _ParrentComponent extends react.Component {
  +  // String refs
     showInputValue(_) {
       var input = react.findDOMNode(ref('inputRef')) as InputElement;
       print(input.value);
  
positive.code:   setClientConfiguration();
    var component = ParrentComponent({});
    react.render(component, mountedNode);
  }
negative.code: import "dart:html";
  import 'dart:js';
  
  import "package:react/react.dart" as react;
  import "package:react/react_client.dart";
  
  var ChildComponent = react.registerComponent(() => new _ChildComponent());
  class _ChildComponent extends react.Component {
  