+static size_t
+ec_node_option_get_children_count(const struct ec_node *gen_node)
+{
+ struct ec_node_option *node = (struct ec_node_option *)gen_node;
+
+ if (node->child)
+ return 1;
+ return 0;
+}
+
+static int
+ec_node_option_get_child(const struct ec_node *gen_node, size_t i,
+ struct ec_node **child, unsigned int *refs)
+{
+ struct ec_node_option *node = (struct ec_node_option *)gen_node;
+
+ if (i >= 1)
+ return -1;
+
+ *child = node->child;
+ *refs = 1;
+ return 0;
+}
+