import { HttpParams } from '@angular/common/http';
/**
 * Provides a set of methods used for http.
 */
export declare class HttpUtils {
    /**
     * Append data to http params
     * @param params Http params
     * @param data Data to append
     * @param arraySep Array separator
     * @return New http params
     *
     * @author Joaquin Volpe <joaquin.volpe@woopasoft.com>
     */
    static appendParams(params: HttpParams, data: any, arraySep?: string): HttpParams;
}