Method shouldComponentUpdate

src/higherOrders/FormItem.js:74–76

(nextProps, nextState)

    }

    shouldComponentUpdate (nextProps, nextState) {
      return !shallowEqual(nextProps, this.props) || !shallowEqual(this.state, nextState);
    }

    componentWillUnmount () {
      const { itemUnbind, name } = this.props;