/**
 * Nicely formats a number of bytes with size indication bytes/KB/MB.
 * @param num Number of bytes
 * @returns Returns a formatted number
 */
export declare function formatBytes(num: number): string;
/**
 * Formats a string of extensions '.svg,.png,.jpg' => '.svg,.png and .jpg'
 * @param exts string of extensions ie '.svg,'.png'
 * @returns formatted string of extensions
 */
export declare function getReadableFileExtensions(exts: string): string;