import { Observable } from 'rxjs';
import { HttpClient, HttpResponseBase } from '@angular/common/http';
export declare class BistrackClientExtension {
    private httpClient;
    private baseURL;
    constructor(http: HttpClient, baseUrl?: string);
    downloadFile(fileName: string): Observable<Blob>;
    protected processDownloadFile(response: HttpResponseBase): Observable<Blob>;
}