docs: public DescribeFleetUtilizationResult withFleetUtilization(FleetUtilization... fleetUtilization) {
          if (this.fleetUtilization == null) {
              setFleetUtilization(new java.util.ArrayList<FleetUtilization>(fleetUtilization.length));
          }
          for (FleetUtilization ele : fleetUtilization) {
              this.fleetUtilization.add(ele);
          }
          return this;
      }