/**
 * Trailing-edge debounce: collapses calls that arrive within `waitMs` of each
 * other into a single invocation, scheduled `waitMs` after the most recent
 * call. The last call's arguments win.
 *
 * The returned function carries two extra methods:
 *   - cancel(): drop any pending invocation (use on shutdown so a timer
 *     doesn't keep the process alive).
 *   - flush():  run any pending invocation immediately (useful in tests).
 */
export declare function debounce<A extends unknown[]>(fn: (...args: A) => void, waitMs: number): ((...args: A) => void) & {
    flush: () => void;
    cancel: () => void;
};
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