code: public DataPointLongBean addDataPoint(Date timestamp, long value, Map<String, String> tags) {
          DataPointLongBean point = new DataPointLongBean(timestamp, value);
          for (Entry<String, String> entry : tags.entrySet()) {
              point.addTag(entry.getKey(), entry.getValue());
          }
          dataPoints.add(point);
          return point;
      }
docs: Adds a single data point to the metric.
  @param timestamp
  @param value
  @param tags