silverstripe-framework/Forms/GridField/GridFieldToolbarHeader.php

<?php

namespace SilverStripe\Forms\GridField;

use SilverStripe\View\SSViewer;

/**
 * Adding this class to a {@link GridFieldConfig} of a {@link GridField} adds
 * a header title to that field.
 *
 * The header serves to display the name of the data the GridField is showing.
 */
class GridFieldToolbarHeader implements GridField_HTMLProvider {

	/**
	 * @param GridField $gridField
	 * @return array
     */
	public function getHTMLFragments($gridField) {
		$templates = SSViewer::get_templates_by_class($this, '', __CLASS__);
		return array(
			'header' => $gridField->renderWith($templates)
		);
	}
}