import { DateTimeOptions, Interval } from "luxon";
import { Field } from "../field";
/** Validate.isInterval options. */
export interface IIsInterval extends DateTimeOptions {
}
/** Validate that value is a valid date time interval parsed by 'luxon' library. */
export declare function isInterval(value?: string, options?: IIsInterval): Interval;
export declare class IntervalField extends Field<Interval> {
    protected readonly options: IIsInterval;
    constructor(options?: IIsInterval);
    validate(value: string): Interval;
    format(value: Interval): string;
}