boolean validLevelSeries(TreeInfo *);
TreeInfo *getValidLevelSeries(TreeInfo *, TreeInfo *);
TreeInfo *getFirstValidTreeInfoEntry(TreeInfo *);
+TreeInfo *getNextValidTreeInfoEntry(TreeInfo *);
TreeInfo *getTreeInfoFirstGroupEntry(TreeInfo *);
int numTreeInfoInGroup(TreeInfo *);
int getPosFromTreeInfo(TreeInfo *);