import { IsoDate, IsoDateTime, IsoDuration, IsoInstant, IsoTime } from './iso-types';
declare function round(instant: IsoInstant, options: {
    smallestUnit: 'hour' | 'minute' | 'second' | 'millisecond';
    roundingIncrement?: number;
    roundingMode?: 'halfExpand' | 'ceil' | 'trunc' | 'floor';
}): IsoDateTime;
declare function round(dateTime: IsoDateTime, options: {
    smallestUnit: 'day' | 'hour' | 'minute' | 'second' | 'millisecond';
    roundingIncrement?: number;
    roundingMode?: 'halfExpand' | 'ceil' | 'trunc' | 'floor';
}): IsoDateTime;
declare function round(time: IsoTime, options: {
    smallestUnit: 'hour' | 'minute' | 'second' | 'millisecond';
    roundingIncrement?: number;
    roundingMode?: 'halfExpand' | 'ceil' | 'trunc' | 'floor';
}): IsoTime;
declare function round(duration: IsoDuration, 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 | IsoDate;
}): IsoDuration;
export default round;