in lib/data_access/http.service.ts [92:97]
static addParamsToUrl(url: string, params?: UrlParams, separateArrayParams: boolean = false): string {
if (params && !/\?/.test(url))
return `${url}?${Http.getParamsQuery(params, separateArrayParams)}`;
return params && !/\?/.test(url) ? `${url}?${Http.getParamsQuery(params, separateArrayParams)}` : url;
}