public String tables(Namespace ns) {
    return SLASH.join("v1", prefix, "namespaces", RESTUtil.encodeNamespace(ns), "tables");
  }
@Test
  public void testTablesWithSlash() {
    Namespace ns = Namespace.of("n/s");
    assertThat(withPrefix.tables(ns)).isEqualTo("v1/ws/catalog/namespaces/n%2Fs/tables");
    assertThat(withoutPrefix.tables(ns)).isEqualTo("v1/namespaces/n%2Fs/tables");
  }