code: static DerivedDoubleGauge newNoopDerivedDoubleGauge(
        String name, String description, String unit, List<LabelKey> labelKeys) {
      return NoopDerivedDoubleGauge.create(name, description, unit, labelKeys);
    }
docs: Returns the no-op implementation of the {@code DerivedDoubleGauge}.
  
  @return the no-op implementation of the {@code DerivedDoubleGauge}.
  @since 0.17