import IHttpClient from './IHttpClient';
import { Observable } from 'rxjs';
import 'whatwg-fetch';
import HttpResponse from './HttpResponse';
import { Headers } from './Headers';
declare class HttpClient implements IHttpClient {
    get(url: string, headers?: Headers): Observable<HttpResponse>;
    post(url: string, body?: {} | FormData, headers?: Headers): Observable<HttpResponse>;
    put(url: string, body?: {}, headers?: Headers): Observable<HttpResponse>;
    patch(url: string, body?: {}, headers?: Headers): Observable<HttpResponse>;
    delete(url: string, headers?: Headers): Observable<HttpResponse>;
    private getJsonBody;
    private addJsonHeaders;
    private performNetworkCall;
}
export default HttpClient;