1<?php 2 3namespace Drupal\Core\Block; 4 5/** 6 * The interface for "title" blocks. 7 * 8 * A title block shows the title returned by the controller. 9 * 10 * @ingroup block_api 11 * 12 * @see \Drupal\Core\Render\Element\PageTitle 13 */ 14interface TitleBlockPluginInterface extends BlockPluginInterface { 15 16 /** 17 * Sets the title. 18 * 19 * @param string|array $title 20 * The page title: either a string for plain titles or a render array for 21 * formatted titles. 22 */ 23 public function setTitle($title); 24 25} 26