// However, in some cases (eg here), there is no way to clone an object, and thus
// we actually have to pass full ownership to Rust.
// Thus, after ret_hu_conv call, o is reset to null and is now a dummy object.
// However, in some cases (eg here), there is no way to clone an object, and thus
// we actually have to pass full ownership to Rust.
// Thus, after ret_hu_conv call, o is reset to null and is now a dummy object.