/**
 * Pad 's' on the left with 'char' until it is n characters wide
 */
export declare function leftPad(s: string, n: number, char: string): string;
/**
 * Formats time in milliseconds (which we get from 'Date.getTime()')
 * to a human-readable time; returns time in seconds rounded to 2
 * decimal places.
 */
export declare function formatTime(num: number): number;