render() {
    return (
      <MyButton {...this.state.data.toJS()} />
    );
  }
// component's state as properties.
component's state as properties.
component ' s state as properties .
render() {
    return (
      <MyButton {...this.state.data.toJS()} />
    );
  }
render ( ) { return ( < MyButton { ... this . state . data . toJS ( ) } / > ) ; }
component's state as properties.
component ' s state as properties .