addHeaders( object )

import { Httpx } from 'https://jslib.k6.io/httpx/0.0.1/index.js';
let session = new Httpx();
session.addHeaders({
  'Authorization': 'token1',
  'User-Agent': "My custom user agent",
  "Content-Type": 'application/x-www-form-urlencoded' 
});
export default function () {
  session.get('https://test-api.k6.io/public/crocodiles/1/'); 
}