code: def document(self, *args, **kwargs):
          
          resp = request.environ.get('pylons.original_response')
          default_message = ("<p>We're sorry but we weren't able to process "
                             " this request.</p>")
          values = dict(prefix=request.environ.get('SCRIPT_NAME', ''),
                        code=request.params.get('code', resp.status_int),
                        message=request.params.get('message', default_message))
          return values
docs: Render the error document