gtk/gtk_since_3_12.go
func (v *HeaderBar) SetHasSubtitle(setting bool) {
	C.gtk_header_bar_set_has_subtitle(v.native(), gbool(setting))
}
func (v *HeaderBar) SetHasSubtitle(setting bool) {
	C.gtk_header_bar_set_has_subtitle(v.native(), gbool(setting))
}
// SetHasSubtitle is a wrapper around gtk_header_bar_set_has_subtitle().