GraphNavigatorInterface::DIRECTION_SERIALIZATION, * 'format' => 'json', * 'type' => 'DateTime', * 'method' => 'serializeDateTimeToJson', * ), * ) * * The direction and method keys can be omitted. * * @return array * * @phpcsSuppress SlevomatCodingStandard.TypeHints.TypeHintDeclaration.MissingReturnTypeHint */ public static function getSubscribingMethods(); }