gtk/print.go
func (ps *PrintSettings) GetPaperWidth(unit Unit) float64 {
	c := C.gtk_print_settings_get_paper_width(ps.native(), C.GtkUnit(unit))
	return float64(c)
}
func (ps *PrintSettings) GetPaperWidth(unit Unit) float64 {
	c := C.gtk_print_settings_get_paper_width(ps.native(), C.GtkUnit(unit))
	return float64(c)
}
// GetPaperWidth() is a wrapper around gtk_print_settings_get_paper_width().