*/ interface MarshallerInterface { /** * Serializes a list of values. * * When serialization fails for a specific value, no exception should be * thrown. Instead, its key should be listed in $failed. */ public function marshall(array $values, ?array &$failed): array; /** * Unserializes a single value and throws an exception if anything goes wrong. * * @throws \Exception Whenever unserialization fails */ public function unmarshall(string $value): mixed; }