public void pointTo(Object baseObject, long baseOffset, int sizeInBytes) {
        assert numFields >= 0 : "numFields (" + numFields + ") should >= 0";
        this.baseObject = baseObject;
        this.baseOffset = baseOffset;
        this.sizeInBytes = sizeInBytes;
    }
Update this UnsafeRow to point to different backing data.

@param baseObject  the base object
@param baseOffset  the offset within the base object
@param sizeInBytes the size of this row's backing data, in bytes
indexr-query-opt/src/main/java/io/indexr/query/row/UnsafeRow.java