code: @Override
      public String toStatsString(final String aIntervalName, final TimeUnit unit) {
          final StringBuilder b = new StringBuilder();
          b.append(getName()).append(' ');
          for (final Map.Entry<String, TypeAwareStatValue> entry : values.entrySet()) {
              final String key = entry.getKey();
              final StatValue value = entry.getValue();
              b.append(key).append(value.getValueAsString(aIntervalName));
          }
          return b.toString();
      }
docs: {@inheritDoc}