static int cancel_on_extension_chunk_recv_callback(nghttp2_session *session,
                                                   const nghttp2_frame_hd *hd,
                                                   const uint8_t *data,
                                                   size_t len,
                                                   void *user_data) {
  (void)session;
  (void)hd;
  (void)data;
  (void)len;
  (void)user_data;

  return NGHTTP2_ERR_CANCEL;
}
static int cancel_on_extension_chunk_recv_callback(nghttp2_session *session,
                                                   const nghttp2_frame_hd *hd,
                                                   const uint8_t *data,
                                                   size_t len,
                                                   void *user_data) {
  (void)session;
  (void)hd;
  (void)data;
  (void)len;
  (void)user_data;

  return NGHTTP2_ERR_CANCEL;
}