import { IntervalNode } from '../ast/interval.js';
/**
 * Create a new interval.
 * @param unit The interval unit, such as day or year.
 * @param steps The number of interval unit steps.
 */
export declare function interval(unit: string, steps: number): IntervalNode;
/**
 * Create a new years interval.
 * @param steps The number of years.
 */
export declare function years(steps: number): IntervalNode;
/**
 * Create a new months interval.
 * @param steps The number of months.
 */
export declare function months(steps: number): IntervalNode;
/**
 * Create a new days interval.
 * @param steps The number of days.
 */
export declare function days(steps: number): IntervalNode;
/**
 * Create a new hours interval.
 * @param steps The number of hours.
 */
export declare function hours(steps: number): IntervalNode;
/**
 * Create a new minutes interval.
 * @param steps The number of minutes.
 */
export declare function minutes(steps: number): IntervalNode;
/**
 * Create a new seconds interval.
 * @param steps The number of seconds.
 */
export declare function seconds(steps: number): IntervalNode;
/**
 * Create a new milliseconds interval.
 * @param steps The number of milliseconds.
 */
export declare function milliseconds(steps: number): IntervalNode;
/**
 * Create a new microseconds interval.
 * @param steps The number of microseconds.
 */
export declare function microseconds(steps: number): IntervalNode;
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