+ // in a number of cases, tree node is no valid level set
+ if (node == NULL || node->node_group || node->parent_link || node->is_copy)
+ return FALSE;
+
+ return TRUE;
+}
+
+TreeInfo *getValidLevelSeries(TreeInfo *node, TreeInfo *default_node)
+{
+ if (validLevelSeries(node))
+ return node;
+ else if (node->is_copy)
+ return getTreeInfoFromIdentifier(leveldir_first, node->identifier);
+ else
+ return getFirstValidTreeInfoEntry(default_node);