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