/**
 * Reference-counted body scroll lock for modals/drawers, keyed per instance.
 *
 * The first `lock` snapshots and overwrites `document.body` inline styles to
 * disable scrolling; the last matching `unlock` restores them. Safe to call
 * with an unknown key and in non-browser environments (no-ops).
 */
export declare const bodyScrollLock: {
    /**
     * Acquires the lock for `key`. The first active key applies the scroll lock.
     * @param {string} key - Unique per-instance lock key.
     * @returns {void} Nothing.
     */
    lock(key: string): void;
    /**
     * Releases the lock for `key`. Restores body styles once no keys remain.
     * @param {string} key - Unique per-instance lock key.
     * @returns {void} Nothing.
     */
    unlock(key: string): void;
};
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