docs: public ModifySnapshotScheduleResult withAssociatedClusters(ClusterAssociatedToSchedule... associatedClusters) {
          if (this.associatedClusters == null) {
              setAssociatedClusters(new com.amazonaws.internal.SdkInternalList<ClusterAssociatedToSchedule>(associatedClusters.length));
          }
          for (ClusterAssociatedToSchedule ele : associatedClusters) {
              this.associatedClusters.add(ele);
          }
          return this;
      }