import { default as dayjs } from 'dayjs';
import type { Dayjs } from 'dayjs';
declare type DayRange = [Dayjs | undefined, Dayjs | undefined];
export declare const isValidRange: (range: DayRange) => boolean;
declare type GetDefaultValueParams = {
    lang: string;
    unit: 'month' | 'year';
    unlinkPanels: boolean;
};
export declare type DefaultValue = [Date, Date] | Date | undefined;
export declare const getDefaultValue: (defaultValue: DefaultValue, { lang, unit, unlinkPanels }: GetDefaultValueParams) => dayjs.Dayjs[];
export {};