Rest request with custom headers missing in samples about typed-rest-client HOT 3 CLOSED

import * as rm from 'typed-rest-client/RestClient';
import * as hm from 'typed-rest-client/Handlers'

const basicHandler: hm.BasicCredentialHandler = new hm.BasicCredentialHandler(username, password);
const bearerHandler: hm.BearerCredentialHandler = new hm.BearerCredentialHandler(token);
const options: rm.IRequestOptions = <rm.IRequestOptions>({ additionalHeaders: { 'key1': val1, 'key2': val2, ... })
let restc: rm.RestClient = new rm.RestClient('rest-samples', baseUrl, [authHandler, bearerHandler]);
let restRes: rm.IRestResponse<~responseType~> = await restc.get<~responseType~>('get', options);