code: @Benchmark
    @BenchmarkMode(Mode.SampleTime)
    @OutputTimeUnit(TimeUnit.NANOSECONDS)
    public Map<String, String> inject(Data data) {
      Map<String, String> carrier = new HashMap<String, String>();
      data.textFormatBase.inject(data.spanContext, carrier);
      return carrier;
    }
docs: This benchmark attempts to measure performance of {@link TextFormat#inject(SpanContext, Object,
  Setter)}.