gtk/combo_box.go
func (v *ComboBoxText) PrependText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_combo_box_text_prepend_text(v.native(), (*C.gchar)(cstr))
}
func (v *ComboBoxText) PrependText(text string) {
	cstr := C.CString(text)
	defer C.free(unsafe.Pointer(cstr))
	C.gtk_combo_box_text_prepend_text(v.native(), (*C.gchar)(cstr))
}
// PrependText is a wrapper around gtk_combo_box_text_prepend_text().