import { HttpClient } from '@angular/common/http';
import { AsyncSubject } from 'rxjs';
import { EnvConfig } from './env-config';
export declare class ConfigService {
    private _http;
    private _config;
    private _env;
    private _fallbackConfig;
    private _fallbackDev;
    readonly onLoad: AsyncSubject<boolean>;
    constructor(_http: HttpClient);
    load(env: EnvConfig): Promise<{}>;
    isDevMode(): boolean;
    getEnv(): string;
    getApi(key: string): string;
    get(key: any): any;
}