/**
 * Function to convert file size in bytes to human readable format
 * @param size - size of the file in bytes
 * @returns {string} - human readable file size
 * @example <caption>Example usage of readableFileSize</caption>
 * readableFileSize(1024) // returns '1 kB'
 * readableFileSize(1024 * 1024 * 1024) // returns '1 GB'
 */
export declare function readableFileSize(size: number): string;
