presto-parquet/src/main/java/io/prestosql/parquet/reader/LevelRLEReader.java/LevelRLEReader/readLevel
class LevelRLEReader:    @Override
    public int readLevel()
    {
        try {
            return delegate.readInt();
        }
        catch (IOException e) {
            throw new ParquetDecodingException(e);
        }
    }