public Configuration conf() {
        return conf;
    }
@Test
    void testResource() throws IOException, ClassNotFoundException {
        ClassLoader cl =
                new ClassLoader(Thread.currentThread().getContextClassLoader()) {
                    @Nullable
                    @Override
                    public URL getResource(String name) {
                        throw new RuntimeException();
                    }
                };
        SerializableConfiguration conf =
                deserializeObject(
                        serializeObject(new SerializableConfiguration(new Configuration())), cl);
        conf.conf().getInt("one-key", 0);
    }