docs: public PurchaseScheduledInstancesResult withScheduledInstanceSet(ScheduledInstance... scheduledInstanceSet) {
          if (this.scheduledInstanceSet == null) {
              setScheduledInstanceSet(new com.amazonaws.internal.SdkInternalList<ScheduledInstance>(scheduledInstanceSet.length));
          }
          for (ScheduledInstance ele : scheduledInstanceSet) {
              this.scheduledInstanceSet.add(ele);
          }
          return this;
      }