/**
 * Executes a function with throttling. Creates and caches the throttled version
 * of the function based on the key and delay.
 *
 * @param key - Unique identifier for the throttled function
 * @param delay - Throttle delay in ms
 * @param fn - Function to throttle
 */
export declare function throttle<T extends (...args: any[]) => any>(key: string, delay: number, fn: T, edge?: 'leading' | 'trailing' | 'both'): (...args: Parameters<T>) => ReturnType<T>;