presto-spi/src/main/java/io/prestosql/spi/block/AbstractSingleMapBlock.java/AbstractSingleMapBlock/bytesCompare
class AbstractSingleMapBlock:    @Override
    public int bytesCompare(int position, int offset, int length, Slice otherSlice, int otherOffset, int otherLength)
    {
        position = getAbsolutePosition(position);
        if (position % 2 == 0) {
            return getRawKeyBlock().bytesCompare(position / 2, offset, length, otherSlice, otherOffset, otherLength);
        }
        else {
            return getRawValueBlock().bytesCompare(position / 2, offset, length, otherSlice, otherOffset, otherLength);
        }
    }