LayoutEntityDisplayInterface.php

<?php

namespace Drupal\layout_builder\Entity;

use Drupal\Core\Entity\Display\EntityDisplayInterface;
use Drupal\layout_builder\LayoutBuilderEnabledInterface;
use Drupal\layout_builder\SectionListInterface;

/**
 * Provides an interface for entity displays that have layout.
 *
 * @todo Refactor this interface in https://www.drupal.org/node/2985362.
 */
interface LayoutEntityDisplayInterface extends EntityDisplayInterface, SectionListInterface, LayoutBuilderEnabledInterface {
    
    /**
     * Determines if the display allows custom overrides.
     *
     * @return bool
     *   TRUE if custom overrides are allowed, FALSE otherwise.
     */
    public function isOverridable();
    
    /**
     * Sets the display to allow or disallow overrides.
     *
     * @param bool $overridable
     *   TRUE if the display should allow overrides, FALSE otherwise.
     *
     * @return $this
     */
    public function setOverridable($overridable = TRUE);

}