docs: public ListResourceDataSyncResult withResourceDataSyncItems(ResourceDataSyncItem... resourceDataSyncItems) {
          if (this.resourceDataSyncItems == null) {
              setResourceDataSyncItems(new com.amazonaws.internal.SdkInternalList<ResourceDataSyncItem>(resourceDataSyncItems.length));
          }
          for (ResourceDataSyncItem ele : resourceDataSyncItems) {
              this.resourceDataSyncItems.add(ele);
          }
          return this;
      }