public static Builder builder() {
    return new Builder();
  }
@Test
  public void testRoundTripSerDe() throws JsonProcessingException {
    String fullJson = "{\"namespaces\":[[\"accounting\"],[\"tax\"]],\"next-page-token\":null}";
    ListNamespacesResponse fullValue = ListNamespacesResponse.builder().addAll(NAMESPACES).build();
    assertRoundTripSerializesEquallyFrom(fullJson, fullValue);

    String emptyNamespaces = "{\"namespaces\":[],\"next-page-token\":null}";
    assertRoundTripSerializesEquallyFrom(emptyNamespaces, ListNamespacesResponse.builder().build());
  }