EntityDisplayModeInterface.php

<?php

namespace Drupal\Core\Entity;

use Drupal\Core\Config\Entity\ConfigEntityInterface;

/**
 * Provides an interface for entity types that hold form and view mode settings.
 */
interface EntityDisplayModeInterface extends ConfigEntityInterface {
    
    /**
     * Gets the entity type this display mode is used for.
     *
     * @return string
     *   The entity type name.
     */
    public function getTargetType();
    
    /**
     * Set the entity type this display mode is used for.
     *
     * @param string $target_entity_type
     *   The target entity type for this display mode.
     *
     * @return $this
     */
    public function setTargetType($target_entity_type);

}