code: def handle_error(self, error, req, schema, error_status_code, error_headers):
          
          status_code = error_status_code or self.DEFAULT_VALIDATION_STATUS
          raise bottle.HTTPError(
              status=status_code,
              body=error.messages,
              headers=error_headers,
              exception=error,
          )
docs: Handles errors during parsing. Aborts the current request with a
          400 error.