gtk/gtk.go
func (v *Calendar) SetDisplayOptions(flags CalendarDisplayOptions) {
	C.gtk_calendar_set_display_options(v.native(),
		C.GtkCalendarDisplayOptions(flags))
}
func (v *Calendar) SetDisplayOptions(flags CalendarDisplayOptions) {
	C.gtk_calendar_set_display_options(v.native(),
		C.GtkCalendarDisplayOptions(flags))
}
// SetDisplayOptions is a wrapper around gtk_calendar_set_display_options().