/**
 * Retrieve a string in the form of "YYYY-MM-DD-HH-MM-SS-MS" from a Date object.
 *
 * @param date - The date to convert, defaults to the current date
 */
export declare function date2string(date?: Date): string;
/**
 * Print a number of milliseconds in a human-readable format including correct spacing.
 */
export declare function printAsMs(ms: number, precision?: number): string;