presto-hive/src/main/java/io/prestosql/plugin/hive/HiveTableProperties.java/HiveTableProperties/getSortedBy
class HiveTableProperties:    @SuppressWarnings("unchecked")
    private static List<SortingColumn> getSortedBy(Map<String, Object> tableProperties)
    {
        return (List<SortingColumn>) tableProperties.get(SORTED_BY_PROPERTY);
    }