import { AfterContentInit, OnDestroy } from '@angular/core';
import { NgForm } from '@angular/forms';
import { ActivatedRoute, Router } from '@angular/router';
export declare class NgFormQueryParamsDirective implements OnDestroy, AfterContentInit {
    form: NgForm;
    route: ActivatedRoute;
    router: Router;
    private ngDestroy$;
    private refreshQuery$;
    private queryCheckedFirst;
    private queryParams;
    constructor(form: NgForm, route: ActivatedRoute, router: Router);
    ngOnDestroy(): void;
    ngAfterContentInit(): void;
    updateForm(queryParams: any, form: NgForm): void;
}