code: public Map<String, Object> export() {
          Map<String, Object> result = new HashMap<String, Object>();
          result.put("min", min());
          result.put("max", max());
          result.put("count", count());
          result.put("percentiles", percentiles());
          result.put("timeUnit", timeUnit().toString());
          return result;
      }
docs: Exports this object to a plain map structure which can be easily converted into other
  target formats.
  
  @return the exported structure.