SqlEntityStorageInterface.php

<?php

namespace Drupal\Core\Entity\Sql;

use Drupal\Core\Entity\EntityStorageInterface;

/**
 * A common interface for SQL-based entity storage implementations.
 */
interface SqlEntityStorageInterface extends EntityStorageInterface {
    
    /**
     * Gets a table mapping for the entity's SQL tables.
     *
     * @param \Drupal\Core\Field\FieldStorageDefinitionInterface[] $storage_definitions
     *   (optional) An array of field storage definitions to be used to compute
     *   the table mapping. Defaults to the ones provided by the entity field
     *   manager.
     *
     * @return \Drupal\Core\Entity\Sql\TableMappingInterface
     *   A table mapping object for the entity's tables.
     */
    public function getTableMapping(array $storage_definitions = NULL);

}