silverstripe-framework/admin/javascript/src/components/grid-field/header.js

import React from 'react';
import SilverStripeComponent from 'silverstripe-component.js';
import GridFieldRowComponent from './row';

class GridFieldHeaderComponent extends SilverStripeComponent {

    render() {
        return (
            <GridFieldRowComponent>{this.props.children}</GridFieldRowComponent>
        );
    }

}

export default GridFieldHeaderComponent;