JarOutputStream(outputStream).use { jarStream ->
                sourceFiles.forEach { dir ->
                    check(Files.isDirectory(dir)) { "Must be a directory" }
                    Files.walkFileTree(dir, object : SimpleFileVisitor<Path>() {
                        override fun visitFile(file: Path, attrs: BasicFileAttributes): FileVisitResult {

                    }
                }
            }
            return builder.build()
        }

        private
        fun processDirectory(dir: Path, builder: Trie.Builder) {
            Files.walkFileTree(dir, object : SimpleFileVisitor<Path>() {
                override fun visitFile(file: Path, attrs: BasicFileAttributes): FileVisitResult {
                    val zipEntry = ZipEntry(dir.relativize(file).toString())

            shadowPackage
        )

    private
    fun visitClassDirectory(dir: Path, classes: ClassGraph, classesDir: File, manifest: Path, buildReceipt: Path) {
        Files.walkFileTree(
            dir,
            object : FileVisitor<Path> {

                private
                var seenManifest: Boolean = false