export declare function a_sume<T>(fn: () => Promise<T>, throws: (e: Error) => Error): Promise<T>;
export declare function s_sume<T>(fn: () => T, throws: (e: Error) => Error): T;
export declare function filenameOutsideFabLocations(filename: string): boolean;
export declare function getContentType(pathname: string): string;
export declare function getCacheHeaders(immutable: boolean): {
    'cache-control': string;
};
export declare function matchPath<T>(lookup_table: {
    [pathname: string]: T;
}, _pathname: string): T | undefined;
export declare const stripTrailingSlash: (str: string) => string;