import { EventEmitter } from '@angular/core';
import * as i0 from "@angular/core";
/**
 * Keeps track of how many Clarity Datepicker there are open.
 * This is needed for the ClrDaterangepickerContainerComponent, to know when to close the popover.
 */
export declare class OpenedDatepickersTrackerService {
    private openedDatepickersCount;
    /**
     * Event triggered when value changes.
     */
    valueChange: EventEmitter<boolean>;
    /**
     * Tracks an opened datepicker.
     * @param opened - Opened state.
     */
    track(opened: boolean): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<OpenedDatepickersTrackerService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<OpenedDatepickersTrackerService>;
}