gtk/gtk.go
func (v *ProgressBar) GetFraction() float64 {
	c := C.gtk_progress_bar_get_fraction(v.native())
	return float64(c)
}
func (v *ProgressBar) GetFraction() float64 {
	c := C.gtk_progress_bar_get_fraction(v.native())
	return float64(c)
}
// GetFraction() is a wrapper around gtk_progress_bar_get_fraction().