import { Temporal } from 'temporal-polyfill';
/**
 * Parses a Temporal duration. It can parse three types of inputs:
 *
 * + Numeric strings, interpreted as millisecond durations,
 * + ISO-8601 strings, parsed according to the spec,
 * + '<int> <unit>', where unit is one of the values accepted by Luxon. The
 *   trailing s may be omitted from the long forms. Note that there must be at
 *   least one space between the numeric and unit portions.
 */
export declare function parseDuration(s: string): Temporal.Duration;