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-rw-r--r--include/qapi/visitor-impl.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h
index 962ba1df35..e87709db5c 100644
--- a/include/qapi/visitor-impl.h
+++ b/include/qapi/visitor-impl.h
@@ -61,6 +61,9 @@ struct Visitor
     /* Must be set */
     GenericList *(*next_list)(Visitor *v, GenericList *tail, size_t size);
 
+    /* Optional; intended for input visitors */
+    void (*check_list)(Visitor *v, Error **errp);
+
     /* Must be set */
     void (*end_list)(Visitor *v, void **list);