interface HeatmapOptions {
    startDate?: Date | string;
    endDate?: Date | string;
    withOutsideDates?: boolean;
    firstDayOfWeek?: 0 | 1 | 2 | 3 | 4 | 5 | 6;
}
export declare function getDatesRange({ startDate, endDate, withOutsideDates, firstDayOfWeek, }?: HeatmapOptions): (string | null)[][];
export {};