import { HttpBackend } from '@angular/common/http';
import { ConfigOptions } from './config.interface';
import * as i0 from "@angular/core";
export declare class ConfigService<T extends object = Record<string, any>> {
    private config;
    private httpClient;
    private configDeprecated;
    private _isLoaded$;
    isLoaded$: import("rxjs").Observable<boolean>;
    constructor(handler: HttpBackend);
    /**
     * Use to get the all config file (merge from environnement.ts and config.json)
     */
    getConfigs(): any;
    /**
     * Use to get the data found in config file
     */
    getConfig<T = any>(key: string, defaultValue?: unknown): T;
    private handleDeprecatedConfig;
    private handleDeprecationPossibility;
    /**
     * This method loads "[path]" to get all config's variables
     */
    load(options: ConfigOptions<T>): true | Promise<unknown>;
    static ɵfac: i0.ɵɵFactoryDeclaration<ConfigService<any>, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ConfigService<any>>;
}