/**
 * Debounce a possibly-undefined callback. The latest `fn` is always invoked
 * (captured by ref, so changing it between renders doesn't reset the timer),
 * and any pending call is cleared on unmount. `cancel` drops a pending call —
 * use it when a selection makes the trailing search irrelevant.
 */
export declare function useDebouncedCallback<A extends unknown[]>(fn: ((...args: A) => void) | undefined, ms: number): ((...args: A) => void) & {
    cancel: () => void;
};