def render_preview(self, request, **kwargs):
        self.preview = True
        ctx = self.get_context_data(**kwargs)
        return self.render_to_response(ctx)
get # of async pendings
dataset/ETHPy150Open django-oscar/django-oscar/src/oscar/apps/checkout/views.py/PaymentDetailsView.render_preview--crossover with--dataset/ETHPy150Open openstack/swift/swift/common/middleware/recon.py/ReconMiddleware.get_async_info