export interface UseControllableStateOptions<T> {
    /** Controlled value. When defined, the hook is in controlled mode. */
    value?: T;
    /** Initial state when uncontrolled. Ignored once `value` is set.  */
    defaultValue?: T;
    /** Fires on every write — controlled callers must apply it.       */
    onChange?: (next: T) => void;
}
export declare function useControllableState<T>({ value, defaultValue, onChange, }: UseControllableStateOptions<T>): [T | undefined, (next: T) => void];
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