/**
 * Executes a callback repeatedly with a fixed time delay between calls.
 * Automatically clears interval if delay changes or component unmounts.
 *
 * @param callback - Function to execute at each interval
 * @param delay - Delay in milliseconds, or `null` to disable
 *
 * @example
 * useInterval(() => console.log("Tick"), 1000);
 */
export declare const useInterval: (callback: () => void, delay: number | null) => void;
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