code: public ContentsId get(String tableName) {
  		ContentsId contentsId = null;
  		try {
  			if (contentsIdDao.isTableExists()) {
  				contentsId = contentsIdDao.queryForTableName(tableName);
  			}
  		} catch (SQLException e) {
  			throw new GeoPackageException(
  					"Failed to query contents id for GeoPackage: "
  							+ geoPackage.getName() + ", Table Name: "
  							+ tableName, e);
  		}
  		return contentsId;
  	}
docs: Get the contents id object
  
  @param tableName
  table name
  @return contents id or null