import { InjectionToken } from '@angular/core';
import { DocumentService } from './document.service';
import { NGXLogger } from 'ngx-logger';
export declare const DocumentServiceToken: InjectionToken<{}>;
export declare const USE_CUSTOM_API_ENDPOINT = "use-custom-api-endpoint";
export declare class DocumentServiceSwitcherService {
    logger: NGXLogger;
    documentServices: DocumentService<any, any>[];
    usedService: DocumentService<any, any>;
    constructor(documentServices: any[], logger: NGXLogger);
    useService(constructor: any): void;
}