设置Vibe.d WebSocket的Cookies

Question

如何为vibe.d websocket客户端连接设置标题“ Cookie”？

import vibe.vibe;

void main()
{
    auto ws_url = URL("wss://domain.com");

    auto ws = connectWebSocket(ws_url);

    logInfo("WebSocket connected");

    while (ws.waitForData())
    {

    }

    logFatal("Connection lost!");
}

谢谢。