gtk/print.go
func (po *PrintOperation) Run(action PrintOperationAction, parent *Window) (PrintOperationResult, error) {
	var err *C.GError = nil
	c := C.gtk_print_operation_run(po.native(), C.GtkPrintOperationAction(action), parent.native(), &err)
	res := PrintOperationResult(c)
	if res == PRINT_OPERATION_RESULT_ERROR {
		defer C.g_error_free(err)
		return res, errors.New(C.GoString((*C.char)(err.message)))
	}
	return res, nil
}
func (po *PrintOperation) Run(action PrintOperationAction, parent *Window) (PrintOperationResult, error) {
	var err *C.GError = nil
	c := C.gtk_print_operation_run(po.native(), C.GtkPrintOperationAction(action), parent.native(), &err)
	res := PrintOperationResult(c)
	if res == PRINT_OPERATION_RESULT_ERROR {
		defer C.g_error_free(err)
		return res, errors.New(C.GoString((*C.char)(err.message)))
	}
	return res, nil
}
// Run() is a wrapper around gtk_print_operation_run().