EntityTestViewBuilderOverriddenView.php

<?php

namespace Drupal\entity_test;

use Drupal\Core\Entity\EntityInterface;

/**
 * Provides a view builder that overrides ::view() and ::viewMultiple().
 */
class EntityTestViewBuilderOverriddenView extends EntityTestViewBuilder {
    
    /**
     * {@inheritdoc}
     */
    public function view(EntityInterface $entity, $view_mode = 'full', $langcode = NULL) {
        $build = [];
        $build[$entity->id()]['#plain_text'] = $entity->label();
        return $build;
    }
    
    /**
     * {@inheritdoc}
     */
    public function viewMultiple(array $entities = [], $view_mode = 'full', $langcode = NULL) {
        $build = [];
        foreach ($entities as $key => $entity) {
            $build[$key] = $this->view($entity, $view_mode, $langcode);
        }
        return $build;
    }

}