import { AsyncValidatorFn } from '@angular/forms';
import * as i0 from "@angular/core";
export declare class UniquenessValidatorService {
    private http;
    build(url: string, message?: string): AsyncValidatorFn;
    static ɵfac: i0.ɵɵFactoryDeclaration<UniquenessValidatorService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<UniquenessValidatorService>;
}