import * as i0 from "@angular/core";
export type GetTokenFn = () => Promise<string>;
export declare class HelpCenterConfigService {
    private _apiBaseUrl;
    private _getTokenFn?;
    setApiBaseUrl(url: string): void;
    getApiBaseUrl(): string;
    setGetTokenFn(fn: GetTokenFn): void;
    getTokenFn(): GetTokenFn | undefined;
    static ɵfac: i0.ɵɵFactoryDeclaration<HelpCenterConfigService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<HelpCenterConfigService>;
}