import { IsoDateTime } from '../iso-types';
export declare function roundDuration({ years, months, weeks, days, hours, minutes, seconds, milliseconds }: {
    years?: number | undefined;
    months?: number | undefined;
    weeks?: number | undefined;
    days?: number | undefined;
    hours?: number | undefined;
    minutes?: number | undefined;
    seconds?: number | undefined;
    milliseconds?: number | undefined;
}, options: {
    largestUnit: 'auto' | 'year' | 'month' | 'week' | 'day' | 'hour' | 'minute' | 'second' | 'millisecond';
    smallestUnit: 'year' | 'month' | 'week' | 'day' | 'hour' | 'minute' | 'second' | 'millisecond';
    roundingIncrement: number;
    roundingMode: 'halfExpand' | 'ceil' | 'trunc' | 'floor';
    relativeTo?: IsoDateTime;
}): {
    years: number;
    months: number;
    weeks: number;
    days: number;
    hours: number;
    minutes: number;
    seconds: number;
    milliseconds: number;
};