public class Foo {
  public Foo (string msg, ...) {
    string arg = msg;
    va_list args = va_list ();
    while ( arg != null ) {
      GLib.debug (arg);
      arg = args.arg ();
    }
  }
}

private static int main (string[] args) {
  var foo = new Foo ("one", "two", "three");

  return 0;
}
