public void cell(Cell cell) throws SAXException {
        rowHadCells = true;
        findInsertionPoint();
        cell.setPosition(currentRow, insertionPoint);
        owner.cell(cell);
        if (cell.getBottom() > currentRow + 1) {
            cellsIfEffect.add(cell);
        }
        insertionPoint = cell.getRight();
        for (int i = nextOldCell; i < cellsOnCurrentRow.length; i++) {
            cellsOnCurrentRow[i].errOnHorizontalOverlap(cell);
        }
    }
The local name of the element that established this row group or
<code>null</code> if this is an implicit row group.
src/nu/validator/checker/table/RowGroup.java