gtk/print.go
func (ps *PrintSettings) SetPaperWidth(width float64, unit Unit) {
	C.gtk_print_settings_set_paper_width(ps.native(), C.gdouble(width), C.GtkUnit(unit))
}
func (ps *PrintSettings) SetPaperWidth(width float64, unit Unit) {
	C.gtk_print_settings_set_paper_width(ps.native(), C.gdouble(width), C.GtkUnit(unit))
}
// SetPaperWidth() is a wrapper around gtk_print_settings_set_paper_width().