code: public static <K, V> OMVRBTreeEntry<K, V> next(final OMVRBTreeEntry<K, V> t) {
      if (t == null)
        return null;
  
      final OMVRBTreeEntry<K, V> succ;
      if (t.tree.pageIndex < t.getSize() - 1) {
        // ITERATE INSIDE THE NODE
        succ = t;
        t.tree.pageIndex++;
      } else {
        // GET THE NEXT NODE
        succ = OMVRBTree.successor(t);
        t.tree.pageIndex = 0;
      }
  
      return succ;
    }
docs: Returns the next item of the tree.