gtk/gtk.go
func (v *Calendar) GetDetailWidthChars() int {
	c := C.gtk_calendar_get_detail_width_chars(v.native())
	return int(c)
}
func (v *Calendar) GetDetailWidthChars() int {
	c := C.gtk_calendar_get_detail_width_chars(v.native())
	return int(c)
}
// TODO gtk_calendar_set_detail_func
// GetDetailWidthChars is a wrapper around gtk_calendar_get_detail_width_chars().