title: Set raw POST request body in guzzle 6
body: <p>Is it still possible to set the raw request body (XML data which was properly created at another place) in Guzzle 6 ?</p>
  
  <p>This seems to not work anymore: <a href="https://stackoverflow.com/questions/35293841/specify-raw-body-of-a-post-request-with-guzzle">Specify raw body of a POST request with Guzzle</a></p>