code: func CheckButtonNewWithLabel(label string) (*CheckButton, error) {
  	cstr := C.CString(label)
  	defer C.free(unsafe.Pointer(cstr))
  	c := C.gtk_check_button_new_with_label((*C.gchar)(cstr))
  	if c == nil {
  		return nil, nilPtrErr
  	}
  	return wrapCheckButton(glib.Take(unsafe.Pointer(c))), nil
  }
docs: // CheckButtonNewWithLabel is a wrapper around
  // gtk_check_button_new_with_label().