func (ps *PageSetup) SetBottomMargin(margin float64, unit Unit) {
	C.gtk_page_setup_set_bottom_margin(ps.native(), C.gdouble(margin), C.GtkUnit(unit))
}
func (ps *PageSetup) SetBottomMargin(margin float64, unit Unit) {
	C.gtk_page_setup_set_bottom_margin(ps.native(), C.gdouble(margin), C.GtkUnit(unit))
}
// SetBottomMargin() is a wrapper around gtk_page_setup_set_bottom_margin().