import * as i0 from "@angular/core";
export declare class DateService {
    constructor();
    calculatePreviousTimeline(currentValue: number): {
        date_from: string;
        date_to: string;
        label: string;
    };
    static ɵfac: i0.ɵɵFactoryDeclaration<DateService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DateService>;
}