anchor.diff:  /// A context utility for to assist with common needs of ReactDartContext.
   ///
   /// __For internal/advanced use only.__
  -class ContextHelpers {
  +abstract class ContextHelpers {
     // Wraps context value in a JS Object for use on the JS side.
     // It is wrapped so that the same Dart value can be retrieved from Dart with [_unjsifyNewContext].
     static dynamic jsifyNewContext(dynamic context) {
  
positive.code: ///
  /// ___ OR ___
  ///
  ///     Context MyContext = createContext();
  ///
  ///     class MyClass extends react.Component2 {
  ///       render() {
  
negative.code: ///
  /// __Example__:
  ///
  ///     react.Context MyContext = react.createContext('test');
  ///
  ///     class MyContextTypeClass extends react.Component2 {
  ///       @override
  