gtk/gtk.go
func (v *Calendar) SelectDay(day uint) {
	C.gtk_calendar_select_day(v.native(), C.guint(day))
}
func (v *Calendar) SelectDay(day uint) {
	C.gtk_calendar_select_day(v.native(), C.guint(day))
}
// SelectDay is a wrapper around gtk_calendar_select_day().