presto-spi/src/main/java/io/prestosql/spi/block/AbstractVariableWidthBlock.java/AbstractVariableWidthBlock/getInt
class AbstractVariableWidthBlock:    @Override
    public int getInt(int position, int offset)
    {
        checkReadablePosition(position);
        return getRawSlice(position).getInt(getPositionOffset(position) + offset);
    }