code: public Optional<MetricData> metricData(long applicationId, List<String> queryParams)
      {
          return HTTP.GET(String.format("/v2/mobile_applications/%d/metrics/data.json", applicationId), null, queryParams, METRIC_DATA);
      }
docs: Returns the set of metric data for the given application.
  @param applicationId The id of the application to return metric data for
  @param queryParams The query parameters
  @return The set of metric data