export const ssr: boolean;
export const nativeConnection: boolean;
export function guessMaxImageWidth(dimensions: any, w: any): number;
export function bytesToSize(bytes: any): string;
export const supportsWebp: boolean;
export function selectSrc({ srcSet, maxImageWidth, supportsWebp }: {
    srcSet: any;
    maxImageWidth: any;
    supportsWebp: any;
}): any;
export function fallbackParams({ srcSet, getUrl }: {
    srcSet: any;
    getUrl: any;
}): {
    nsSrcSet?: undefined;
    nsSrc?: undefined;
    ssr?: undefined;
} | {
    nsSrcSet: any;
    nsSrc: any;
    ssr: true;
};