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