docs: def _handle_request(self, request):
          """Finds the resource to which a request maps and then calls it.
          Instantiates, fills and returns a :class:`webob.Response` object. If
          no resource matches the request, a 404 status is set on the response
          object.
  
          :param request: Object representing the current request.
          :type request: :class:`webob.Request`
          """
          response = webob.Response(request=request)
          path = request.path_info
          parsed = self._urlmap(path)
          if parsed:
              path_params, resource = parsed
          else:
              path_params, resource = {}, self.NOT_FOUND_RESOURCE
          instance = resource(request=request, response=response,
              path_params=path_params, application=self)
          response = instance()
          if request.method == 'HEAD':
              response.body = ''
          return response