if (matchingWorkSheet != null) {
// need to put it into a row Iterator
// use a straight comparsion algorithm then do a merge on it
Iterator i1 = new RowIterator(cc_, workSheet);
Iterator i2 = new RowIterator(cc_, matchingWorkSheet);
// find out the diff
DiffAlgorithm diffAlgo = new IteratorRowCompare();
// find out the paragrah level diffs