data: add missing DNode.is_default API (lyd_is_default)

Signed-off-by: Christian Hopps <chopps@labn.net>

Author: choppsv1

cffi/cdefs.h

@@ -941,6 +941,7 @@ struct lyd_value_union {
 
 const char * lyd_get_value(const struct lyd_node *);
 struct lyd_node* lyd_child(const struct lyd_node *);
+ly_bool lyd_is_default(const struct lyd_node *);
 LY_ERR lyd_find_path(const struct lyd_node *, const char *, ly_bool, struct lyd_node **);
 void lyd_free_siblings(struct lyd_node *);
 struct lyd_node* lyd_first_sibling(const struct lyd_node *);

libyang/data.py

@@ -387,6 +387,9 @@ def flags(self):
             ret["new"] = True
         return ret
 
+    def is_default(self) -> bool:
+        return lyd_is_default(self.cdata)
+
     def set_when(self, value: bool):
         if value:
             self.cdata.flags |= lib.LYD_WHEN_TRUE