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public static final class RackAwareOptimizationParams {
    private final ApplicationState applicationState;
    private final Optional<Integer> trafficCostOverride;
    private final Optional<Integer> nonOverlapCostOverride;
    private final Optional<SortedSet<TaskId>> tasksToOptimize;


    /**       
     * Return a new config object with no overrides and the tasksToOptimize initialized to the set of all tasks in the given ApplicationState       
     */        
     public static RackAwareOptimizationParams of(final ApplicationState applicationState);        

    /**       
     * Return a new config object with the tasksToOptimize set to all stateful tasks in the given ApplicationState       
     */  
     public RackAwareOptimizationParams forStatefulTasks();  
     
    /**
     * Return a new config object with the tasksToOptimize set to all stateless tasks in the given ApplicationState
     */  
    public RackAwareOptimizationParams forStatelessTasks();

    /**
     * Return a new config object with the provided tasksToOptimize
     */ 
     public RackAwareOptimizationParams forTasks(final SortedSet<TaskId> tasksToOptimize);

    /**
     * Return a new config object with the provided trafficCost override applied
     */ 
    public RackAwareOptimizationParams withTrafficCostOverride(final int trafficCostOverride);

    /**
     * Return a new config object with the provided nonOverlapCost override applied
     */
    public RackAwareOptimizationParams withNonOverlapCostOverride(final int nonOverlapCostOverride);
}