presto-hive/src/main/java/io/prestosql/plugin/hive/s3/PrestoS3FileSystem.java/PrestoS3FileSystem/open
class PrestoS3FileSystem:    @Override
    public FSDataInputStream open(Path path, int bufferSize)
    {
        return new FSDataInputStream(
                new BufferedFSInputStream(
                        new PrestoS3InputStream(s3, getBucketName(uri), path, requesterPaysEnabled, maxAttempts, maxBackoffTime, maxRetryTime),
                        bufferSize));
    }