docs: public ListStacksResult withStackSummaries(StackSummary... stackSummaries) {
          if (this.stackSummaries == null) {
              setStackSummaries(new com.amazonaws.internal.SdkInternalList<StackSummary>(stackSummaries.length));
          }
          for (StackSummary ele : stackSummaries) {
              this.stackSummaries.add(ele);
          }
          return this;
      }