/**
 * Generates a LQIP (Low Quality Image Placeholder) using the Flight image
 * handling API (via query params)
 * @param src The image src
 * @param widths An array of image widths
 * @param aspect The desired aspect ratio of the placeholder
 */
export declare function getLQIP(src: string, widths: number[], aspect: string, crop: boolean, modifiedDate: string): string;