code: @Test(groups = {SAMPLES})
      public void getBillingStatisticsGroupedByDatacenters() {
          List<BillingStatsEntry> stats = statisticsService
              .billingStats()
              .forGroups(
                  new GroupFilter().nameContains(nameCriteria)
              )
              .groupByDataCenter();
  
          assertNotNull(stats);
      }
docs: Step 2. App query billing statistics grouped by datacenters