import { OptimizedImageFormat } from '../../providers/ImageOptimizationProvider';
/**
 * returns an array of image optimizer urls suitable for use as a responsive background image src property
 *
 * @example
 * ```ts
 * const backgroundImageUrl = useOptimizedImageUrl(url)
 * // returns [base-url, sm-url, md-url, ...]
 * return (
 *   <Box backgroundImage={backgroundImageUrl} />
 * )
 * ```
 */
export declare const useOptimizedImageUrl: (src?: string, format?: OptimizedImageFormat) => string[] | undefined;