name : UnableToProvideChecksum.php <?php declare(strict_types=1); namespace League\Flysystem; use RuntimeException; use Throwable; final class UnableToProvideChecksum extends RuntimeException implements FilesystemException { public function __construct(string $reason, string $path, ?Throwable $previous = null) { parent::__construct("Unable to get checksum for $path: $reason", 0, $previous); } }