161     auto iovcnt = upstream_->response_riovec(iov.data(), iov.size());  in write_clear()
175     upstream_->response_drain(nwrite);  in write_clear()
292   auto iovcnt = upstream_->response_riovec(&iov, 1);  in write_tls()
312     upstream_->response_drain(nwrite);  in write_tls()
314     iovcnt = upstream_->response_riovec(&iov, 1);  in write_tls()
327   auto upstream = static_cast<Http3Upstream *>(upstream_.get());  in read_quic()
332 int ClientHandler::write_quic() { return upstream_->on_write(); }  in write_quic()
338   assert(upstream_);  in upstream_read()
339   if (upstream_->on_read() != 0) {  in upstream_read()
346   assert(upstream_);  in upstream_write()
347   if (upstream_->on_write() != 0) {  in upstream_write()
351   if (get_should_close_after_write() && upstream_->response_empty()) {  in upstream_write()
537     upstream_ = std::make_unique<HttpsUpstream>(this);  in setup_upstream_io_callback()
549   upstream_ = std::move(upstream);  in setup_http3_upstream()
563   if (upstream_) {  in ~ClientHandler()
564     upstream_->on_handler_delete();  in ~ClientHandler()
588 Upstream *ClientHandler::get_upstream() { return upstream_.get(); }  in get_upstream()
658     upstream_ = std::move(http2_upstream);  in validate_next_proto()
672     upstream_ = std::make_unique<HttpsUpstream>(this);  in validate_next_proto()
1161   upstream_ = std::make_unique<Http2Upstream>(this);  in direct_http2_upgrade()
1184   upstream_.release();  in perform_http2_upgrade()
1200   upstream_ = std::move(upstream);  in perform_http2_upgrade()