import { HttpBackend, HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from "@angular/common/http";
import { Observable } from "rxjs";
export declare class InterceptingHandler implements HttpHandler {
    private backend;
    private interceptors;
    private chain;
    constructor(backend: HttpBackend, interceptors: HttpInterceptor[]);
    handle(req: HttpRequest<any>): Observable<HttpEvent<any>>;
    private buildChain;
}