docs: protected HttpResponse sendPayload(HttpEntityEnclosingRequestBase request, byte[] payload) {
      HttpResponse response = null;
      try {
        log(request);
        HttpClient httpclient = new DefaultHttpClient();
        request.setEntity(new ByteArrayEntity(payload));
        response = httpclient.execute(request);
        log(response);
      } catch(IOException ioe) {
        throw new EFhirClientException("Error sending HTTP Post/Put Payload: "+ioe.getMessage(), ioe);
      }
      return response;
    }