Call resource by ``Api`` name.

        :param name: The resource's name (short form)
        :param request: django.http.Request instance
        :param **params: Params for a resource's call

        :return object: Result of resource's execution

def call(self, name, request=None, **params):
        """ Call resource by ``Api`` name.

        :param name: The resource's name (short form)
        :param request: django.http.Request instance
        :param **params: Params for a resource's call

        :return object: Result of resource's execution

        """
        if name not in self.resources:
            raise exceptions.HttpError(
                'Unknown method \'%s\'' % name,
                status=status.HTTP_501_NOT_IMPLEMENTED)
        request = request or HttpRequest()
        resource = self.resources[name]
        view = resource.as_view(api=self)
        return view(request, **params)