TitleBlockPluginInterface.php

<?php

namespace Drupal\Core\Block;


/**
 * The interface for "title" blocks.
 *
 * A title block shows the title returned by the controller.
 *
 * @ingroup block_api
 *
 * @see \Drupal\Core\Render\Element\PageTitle
 */
interface TitleBlockPluginInterface extends BlockPluginInterface {
    
    /**
     * Sets the title.
     *
     * @param string|array $title
     *   The page title: either a string for plain titles or a render array for
     *   formatted titles.
     */
    public function setTitle($title);

}