docs: public DescribeMetricCollectionTypesResult withMetrics(MetricCollectionType... metrics) {
          if (this.metrics == null) {
              setMetrics(new com.amazonaws.internal.SdkInternalList<MetricCollectionType>(metrics.length));
          }
          for (MetricCollectionType ele : metrics) {
              this.metrics.add(ele);
          }
          return this;
      }