code: public void add(NodeData data) throws RepositoryException, UnsupportedOperationException, InvalidItemStateException,
        IllegalStateException
     {
        Statistics s = ALL_STATISTICS.get(ADD_NODE_DATA_DESCR);
        try
        {
           s.begin();
           wcs.add(data);
        }
        finally
        {
           s.end();
        }
     }
docs: {@inheritDoc}