/// Gets the index of the last cell Contained in this row PLUS ONE. The result also
/// happens to be the 1-based column number of the last cell. This value can be used as a
/// standard upper bound when iterating over cells:
///
/// short minColIx = row.GetFirstCellNum();
/// short maxColIx = row.GetLastCellNum();
/// for(short colIx=minColIx; colIx<maxColIx; colIx++) {
/// Cell cell = row.GetCell(colIx);
/// if(cell == null) {
/// continue;
/// }
/// //... do something with cell
/// }
///
///
///