anchor.diff:    /// > Use Component2 and Component2.getSnapshotBeforeUpdate instead.
     /// >
     /// > This will be completely removed when the JS side of it is slated for removal (ReactJS 17 / react.dart 6.0.0)
  -  @Deprecated('6.0.0')
     void componentWillUpdate(Map nextProps, Map nextState) {}
   
     /// > __DEPRECATED - DO NOT USE__
  
positive.code:   /// Force a call to [render] by calling [setState], which effectively "redraws" the `Component`.
    ///
    /// Optionally accepts a [callback] that gets called after the component updates.
    ///
    /// > __DEPRECATED.__
    /// >
    /// > There is no implementation of this within [Component2]. Use [Component2.forceUpdate] when migrating.
    @Deprecated('6.0.0')
    void redraw([callback()]) {
      setState({}, callback);
    }
  
negative.code:   /// Also allows [newState] to be used as a transactional `setState` callback.
    ///
    /// See: <https://facebook.github.io/react/docs/react-component.html#setstate>
    void setState(covariant dynamic newState, [callback()]) {
      if (newState is Map) {
        _nextState.addAll(newState);
  