class Example extends Component {    constructor(props) {     super(props);     this.scrollOnFocus = this.scrollOnFocus.bind(this);   }    scrollOnFocus = inputName => () => {     this.scroll.inputFocused(       findNodeHandle(this[inputName]),     );   }    render() {     return (       <ScrollViewSmart         ref={e => (this.scroll = e)}       >         <TextInput           ref={e => (this.input = e)}           onFocus={this.scrollOnFocus('input')}         />         // ...       </ScrollViewSmart>     );   } }