code: private void handleFormParameters(HttpEntityEnclosingRequestBase httpRequest) {
  		List<NameValuePair> pairs = map(formParams.values(), PARAM_MAPPER);
  		HttpEntity entity = new UrlEncodedFormEntity(pairs, Charset.defaultCharset());
  		httpRequest.setEntity(entity);
  	}
docs: Add parameters as form url encoded content.
  Each parameter is set as a key value entry to request
  body.
  
  @param httpRequest Http request in creation.