/// <summary>
/// Add WebSocketsModule to WebServer.
/// </summary>
/// <param name="webserver">The webserver instance.</param>
/// <param name="assembly">The assembly to load Web Sockets from. Leave null to avoid autoloading.</param>
/// <returns>An instance of webserver.</returns>
/// <exception cref="System.ArgumentNullException">webserver.</exception>
public static IWebServer WithWebSocket(this IWebServer webserver, Assembly assembly = null)
{
if (webserver == null)
{
throw new ArgumentNullException(nameof(webserver));
}
webserver.RegisterModule(new WebSocketsModule());
return(assembly != null?webserver.LoadWebSockets(assembly) : webserver);
}