class RelationshipData

class RelationshipData extends Data {
  
  /**
   * RelationshipData constructor.
   *
   * @param \Drupal\jsonapi\JsonApiResource\ResourceIdentifier[] $data
   *   Resource objects that are the primary data for the response.
   * @param int $cardinality
   *   The number of ResourceIdentifiers that this collection may contain.
   *
   * @see \Drupal\jsonapi\JsonApiResource\Data::__construct
   */
  public function __construct(array $data, $cardinality = -1) {
    assert(Inspector::assertAllObjects($data, ResourceIdentifier::class));
    parent::__construct($data, $cardinality);
  }

}