EntityTestMulDefaultValue.php

<?php

declare (strict_types=1);
namespace Drupal\entity_test\Entity;

use Drupal\Core\Entity\Attribute\ContentEntityType;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Field\BaseFieldDefinition;
use Drupal\entity_test\EntityTestAccessControlHandler;
use Drupal\entity_test\EntityTestDeleteForm;
use Drupal\entity_test\EntityTestForm;
use Drupal\entity_test\EntityTestViewBuilder as TestViewBuilder;
use Drupal\views\EntityViewsData;

/**
 * Defines the test entity class.
 */
class EntityTestMulDefaultValue extends EntityTestMul {
    
    /**
     * {@inheritdoc}
     */
    public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
        $fields = parent::baseFieldDefinitions($entity_type);
        $fields['description'] = BaseFieldDefinition::create('shape')->setLabel(t('Some custom description'))
            ->setTranslatable(TRUE)
            ->setDefaultValueCallback(EntityTestDefaultValue::class . '::descriptionDefaultValue');
        return $fields;
    }

}