public String namespaceProperties(Namespace ns) {
    return SLASH.join("v1", prefix, "namespaces", RESTUtil.encodeNamespace(ns), "properties");
  }
@Test
  public void testNamespacePropertiesWithMultipartNamespace() {
    Namespace ns = Namespace.of("n", "s");
    assertThat(withPrefix.namespaceProperties(ns))
        .isEqualTo("v1/ws/catalog/namespaces/n%1Fs/properties");
    assertThat(withoutPrefix.namespaceProperties(ns)).isEqualTo("v1/namespaces/n%1Fs/properties");
  }