namespace System.Runtime.InteropServices.Marshalling
{
    [CLSCompliant(false)]
    [CustomMarshaller(typeof(GenericPlaceholder), MarshalMode.Default, typeof(ComInterfaceMarshaller<?>))]
    [UnsupportedOSPlatform("android")]
    [UnsupportedOSPlatform("browser")]
    [UnsupportedOSPlatform("ios")]
    [UnsupportedOSPlatform("tvos")]
    public static class ComInterfaceMarshaller<T>
    {
        public static void* ConvertToUnmanaged(T managed);
    }
}