docs: public ListUserHierarchyGroupsResult withUserHierarchyGroupSummaryList(HierarchyGroupSummary... userHierarchyGroupSummaryList) {
          if (this.userHierarchyGroupSummaryList == null) {
              setUserHierarchyGroupSummaryList(new java.util.ArrayList<HierarchyGroupSummary>(userHierarchyGroupSummaryList.length));
          }
          for (HierarchyGroupSummary ele : userHierarchyGroupSummaryList) {
              this.userHierarchyGroupSummaryList.add(ele);
          }
          return this;
      }