api-8.x-1.x-dev/src/DocFileStorage.php

<?php

namespace Drupal\api;

use Drupal\Core\Entity\Sql\SqlContentEntityStorage;

/**
 * Entity storage class for docblock_file entities.
 */
class DocFileStorage extends SqlContentEntityStorage {

  /**
   * {@inheritdoc}
   */
  public function delete(array $entities) {
    // Only delete files which are not already being deleted as set by
    // \Drupal\api\Entity\DocFile::preDelete().
    parent::delete(array_filter($entities, fn ($entity) => !$entity->_being_deleted));
  }

}