endpoint WebSocketServer
{
    // Basic protocol
    Greet() => ()

    // Connection API
    Connect(URL url, String origin, Vector<String> protocols, Vector<String> extensions, IPC::Dictionary additional_request_headers) => (i32 connection_id)
    ReadyState(i32 connection_id) => (u32 ready_state)
    Send(i32 connection_id, bool is_text, ByteBuffer data) =|
    Close(i32 connection_id, u16 code, String reason) =|

    SetCertificate(i32 connection_id, String certificate, String key) => (bool success)
}