presto-orc/src/main/java/io/prestosql/orc/reader/FloatColumnReader.java/FloatColumnReader/readNonNullBlock
class FloatColumnReader:    private Block readNonNullBlock()
            throws IOException
    {
        verifyNotNull(dataStream);
        int[] values = new int[nextBatchSize];
        dataStream.next(values, nextBatchSize);
        return new IntArrayBlock(nextBatchSize, Optional.empty(), values);
    }