return FileVisitResult.CONTINUE;
        }

        @Override
        public FileVisitResult visitFile(final Path file, final BasicFileAttributes attrs) throws IOException {
            if (ComponentUtil.getSystemHelper().getCurrentTimeAsLong() - Files.getLastModifiedTime(file).toMillis() > expiry) {

    ): Map<VirtualFile, KotlinFileStubImpl> =
        buildMap {
            VfsUtilCore.visitChildrenRecursively(binaryRoot, object : VirtualFileVisitor<Void>() {
                override fun visitFile(file: VirtualFile): Boolean {
                    if (!file.isDirectory) {
                        val stub = buildStubByVirtualFile(file, binaryClassCache) ?: return true
                        put(file, stub)