docs: public PutMetricDataRequest withMetricData(MetricDatum... metricData) {
          if (this.metricData == null) {
              setMetricData(new com.amazonaws.internal.SdkInternalList<MetricDatum>(metricData.length));
          }
          for (MetricDatum ele : metricData) {
              this.metricData.add(ele);
          }
          return this;
      }