ITableMetaData metaData = (ITableMetaData)_tableMap.get(tableName); if (metaData == null) { throw new NoSuchTableException(tableName); }  return metaData;
return getTable(tableName).getTableMetaData();
    public ITableMetaData getTableMetaData(String tableName)            throws DataSetException    {        ITableMetaData metaData = (ITableMetaData)_tableMap.get(tableName);        if (metaData == null)        {            throw new NoSuchTableException(tableName);        }        return metaData;    }