docs: public DescribeSourceRegionsResult withSourceRegions(SourceRegion... sourceRegions) {
          if (this.sourceRegions == null) {
              setSourceRegions(new com.amazonaws.internal.SdkInternalList<SourceRegion>(sourceRegions.length));
          }
          for (SourceRegion ele : sourceRegions) {
              this.sourceRegions.add(ele);
          }
          return this;
      }