import { HttpBackend, HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
/**
 * Loads the application configuration information. Uses HttpBackend to by pass interceptor and authentication token to the request.
 * @export
 * @class ConfigService
 */
export declare class ConfigService {
    private handler;
    httpClient: HttpClient;
    constructor(handler: HttpBackend);
    /**
     * Loads the application configuration using the given file/API URL
     * @param {string} appConfigUrl
     * @memberof ConfigService
     */
    getAppConfig(appConfigUrl: string): Observable<any>;
    static ɵfac: i0.ɵɵFactoryDeclaration<ConfigService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ConfigService>;
}