code: protected Map<String, String> params1st(List<FormItem> formItems){
          return RequestUtils.params1st(formItems);
      }
docs: Convenience method to get first parameter values in case <code>multipart/form-data</code> request was used.
  Returns a map where keys are names of all parameters, while values are first value for each parameter, even
  if such parameter has more than one value submitted.
  @param formItems form items retrieved from <code>multipart/form-data</code> request.
  @return a map where keys are names of all parameters, while values are first value for each parameter, even
  if such parameter has more than one value submitted.