/**
 * Caches result of the pure function based on provided input parameters.
 *
 * @param keySelector Cache key selector for complex objects.
 * @example (user: User) => user.id
 * @returns Function with cache middleware
 */
export declare function Pure(keySelector?: (...args: any[]) => any): (target: any, key: string, descriptor: PropertyDescriptor) => PropertyDescriptor;