docs: public String latencyHistoReport() {
          ByteArrayOutputStream baos= new ByteArrayOutputStream();
          PrintStream pw = null;
          try {
              pw = new PrintStream(baos, false, Charsets.UTF_8.name());
          } catch (UnsupportedEncodingException e) {
              Throwables.propagate(e);
          }
  
          //Get a latency report in milliseconds
          m_latencyHistogram.outputPercentileDistributionVolt(pw, 1, 1000.0);
  
          return new String(baos.toByteArray(), Charsets.UTF_8);
      }