EntityViewMode.php

<?php

namespace Drupal\Core\Entity\Entity;

use Drupal\Core\Entity\EntityDisplayModeBase;
use Drupal\Core\Entity\EntityViewModeInterface;

/**
 * Defines the entity view mode configuration entity class.
 *
 * View modes let entities be displayed differently depending on the context.
 * For instance, a node can be displayed differently on its own page ('full'
 * mode), on the home page or taxonomy listings ('teaser' mode), or in an RSS
 * feed ('rss' mode). Modules taking part in the display of the entity (notably
 * the Field API) can adjust their behavior depending on the requested view
 * mode. An additional 'default' view mode is available for all entity types.
 * This view mode is not intended for actual entity display, but holds default
 * display settings. For each available view mode, administrators can configure
 * whether it should use its own set of field display settings, or just
 * replicate the settings of the 'default' view mode, thus reducing the amount
 * of display configurations to keep track of.
 *
 * @see \Drupal\Core\Entity\EntityDisplayRepositoryInterface::getAllViewModes()
 * @see \Drupal\Core\Entity\EntityDisplayRepositoryInterface::getViewModes()
 * @see hook_entity_view_mode_info_alter()
 *
 * @ConfigEntityType(
 *   id = "entity_view_mode",
 *   label = @Translation("View mode"),
 *   entity_keys = {
 *     "id" = "id",
 *     "label" = "label",
 *     "description" = "description",
 *   },
 *   config_export = {
 *     "id",
 *     "label",
 *     "description",
 *     "targetEntityType",
 *     "cache",
 *   },
 *   constraints = {
 *     "ImmutableProperties" = {"id", "targetEntityType"},
 *   }
 * )
 */
class EntityViewMode extends EntityDisplayModeBase implements EntityViewModeInterface {

}