code: @Deprecated
    public LongGauge addLongGauge(
        String name, String description, String unit, List<LabelKey> labelKeys) {
      return addLongGauge(
          name,
          MetricOptions.builder()
              .setDescription(description)
              .setUnit(unit)
              .setLabelKeys(labelKeys)
              .build());
    }
docs: This will be removed in 0.22.
  
  @deprecated since 0.20, use {@link #addLongGauge(String, MetricOptions)}.
  @since 0.17