+struct xref_value* gom_set_xref_value(struct xref_value** data,
+ struct xref_value* newval);
+
+struct address* gom_add_address(struct address** obj);
+int gom_delete_address(struct address** obj);
+
+struct place* gom_add_place(struct place** obj);
+int gom_delete_place(struct place** obj);
+