gtk/print.go
func (po *PrintOperation) SetDefaultPageSetup(ps *PageSetup) {
	C.gtk_print_operation_set_default_page_setup(po.native(), ps.native())
}
func (po *PrintOperation) SetDefaultPageSetup(ps *PageSetup) {
	C.gtk_print_operation_set_default_page_setup(po.native(), ps.native())
}
// SetDefaultPageSetup() is a wrapper around gtk_print_operation_set_default_page_setup().