gtk/gtk_since_3_20.go
func (v *NativeDialog) SetTransientFor(parent IWindow) {
	var pw *C.GtkWindow = nil
	if parent != nil {
		pw = parent.toWindow()
	}
	C.gtk_native_dialog_set_transient_for(v.native(), pw)
}
func (v *NativeDialog) SetTransientFor(parent IWindow) {
	var pw *C.GtkWindow = nil
	if parent != nil {
		pw = parent.toWindow()
	}
	C.gtk_native_dialog_set_transient_for(v.native(), pw)
}
// SetTransientFor() is a wrapper around gtk_native_dialog_set_transient_for().