public static WebSocketHostBuilder UseCommand <TPackageInfo, TPackageMapper>(this WebSocketHostBuilder builder, Action <CommandOptions> configurator)
where TPackageInfo : class
where TPackageMapper : class, IPackageMapper <WebSocketPackage, TPackageInfo>, new()
{
return(builder.UseCommand <TPackageInfo, TPackageMapper>()
.ConfigureServices((ctx, services) =>
{
services.Configure(configurator);
}) as WebSocketHostBuilder);
}