import { ElementRef } from '@angular/core';
import { BehaviorSubject } from 'rxjs';
import { ICoreCompositionInstance } from './ICoreCompositionInstance';
import * as i0 from "@angular/core";
export declare class CoreCompositionService {
    instances: ICoreCompositionInstance[];
    topRef: ElementRef | null;
    leftRef: ElementRef | null;
    mainRef: ElementRef | null;
    leftPartReduced$: BehaviorSubject<boolean>;
    mainViewpotY$: BehaviorSubject<number>;
    constructor();
    static ɵfac: i0.ɵɵFactoryDeclaration<CoreCompositionService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<CoreCompositionService>;
}