export declare class DateRange {
    constructor(start?: string | Date, end?: string | Date, maxDuration?: number);
    static createFromDateRange(from: DateRange, maxDuration?: number): DateRange;
    private _start?;
    set start(val: string);
    get start(): string | undefined;
    private _end?;
    set end(val: string);
    get end(): string | undefined;
    readonly maxDurationInDays?: number;
    get isValid(): boolean;
    isDefined(): boolean;
    hasValidOrder(): boolean;
    durationMaxisNotExceeded(): boolean;
    setStart(value: string | Date): void;
    setEnd(value: string | Date): void;
}