import { OnDestroy, OnInit } from '@angular/core';
import { Observable } from 'rxjs';
import '@rxap/rxjs';
import { AccordionDataSource } from './accordion.data-source';
import * as i0 from "@angular/core";
export declare abstract class PanelAccordionDataSource<Data = unknown, Parameters = unknown> extends AccordionDataSource<Data, Parameters> implements OnDestroy, OnInit {
    protected readonly accordionDataSource: AccordionDataSource<Data, Parameters>;
    getParameters(): Observable<Parameters> | Promise<Parameters> | Parameters;
    ngOnInit(): void;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<PanelAccordionDataSource<any, any>, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<PanelAccordionDataSource<any, any>>;
}