func (v *Widget) GetTooltipText() (string, error) {
	c := C.gtk_widget_get_tooltip_text(v.native())
	if c == nil {
		return "", nilPtrErr
	}
	return C.GoString((*C.char)(c)), nil
}
func (v *Widget) GetTooltipText() (string, error) {
	c := C.gtk_widget_get_tooltip_text(v.native())
	if c == nil {
		return "", nilPtrErr
	}
	return C.GoString((*C.char)(c)), nil
}
// GetTooltipText is a wrapper around gtk_widget_get_tooltip_text().
// A non-nil error is returned in the case that
// gtk_widget_get_tooltip_text returns NULL to differentiate between NULL
// and an empty string.