presto-rcfile/src/main/java/io/prestosql/rcfile/text/LongEncoding.java/LongEncoding/decodeValueInto
class LongEncoding:    @Override
    public void decodeValueInto(int depth, BlockBuilder builder, Slice slice, int offset, int length)
    {
        type.writeLong(builder, parseLong(slice, offset, length));
    }