How to do error handling on custom truffle filesystems about graaljs HOT 3 CLOSED

FileSystem fs = new FileSystem() {
    @Override
    public Path parsePath(URI uri) {
        throw new UnsupportedOperationException("Not supported: parsePath(URI)");
    }

    @Override
    public Path parsePath(String path) {
        return Path.of(path);
    }

    @Override
    public void checkAccess(Path path, Set<? extends AccessMode> modes, LinkOption... linkOptions) throws IOException {
    }

    @Override
    public void createDirectory(Path dir, FileAttribute<?>... attrs) throws IOException {
        throw new UnsupportedOperationException("Not supported: createDirectory");
    }

    @Override
    public void delete(Path path) throws IOException {
        throw new UnsupportedOperationException("Not supported: delete");
    }

    @Override
    public SeekableByteChannel newByteChannel(Path path, Set<? extends OpenOption> options, FileAttribute<?>... attrs) throws IOException {
        throw new IOException("Script not found: " + path);
    }

    @Override
    public DirectoryStream<Path> newDirectoryStream(Path dir, DirectoryStream.Filter<? super Path> filter) throws IOException {
        throw new UnsupportedOperationException("Not supported: newDirectoryStream");
    }

    @Override
    public Path toAbsolutePath(Path path) {
        return path;
    }

    @Override
    public Path toRealPath(Path path, LinkOption... linkOptions) throws IOException {
        return path;
    }

    @Override
    public Map<String, Object> readAttributes(Path path, String attributes, LinkOption... options) throws IOException {
        throw new UnsupportedOperationException("Not supported: readAttributes");
    }
};
IOAccess ioAccess = IOAccess.newBuilder().fileSystem(fs).build();
try (Context context = Context.newBuilder("js").allowIO(ioAccess).build()) {
    String scriptCode = "import 'NonExistingRepoId';";
    context.eval(Source.newBuilder("js", scriptCode, "myModule.mjs").build());
}

Exception in thread "main" Error: Script not found: NonExistingRepoId
	at org.graalvm.polyglot.Context.eval(Context.java:402)

import('NonExistingRepoId').catch(e => console.log(e));