docs: public GetMetricStatisticsRequest withExtendedStatistics(String... extendedStatistics) {
          if (this.extendedStatistics == null) {
              setExtendedStatistics(new com.amazonaws.internal.SdkInternalList<String>(extendedStatistics.length));
          }
          for (String ele : extendedStatistics) {
              this.extendedStatistics.add(ele);
          }
          return this;
      }