}
private void updateAnyBlankReferencingFormulas(int bookIndex, int sheetIndex,
final int rowIndex, final int columnIndex) {
final BookSheetKey bsk = new BookSheetKey(bookIndex, sheetIndex);
_formulaCellCache.applyOperation(new IEntryOperation() {
public void processEntry(FormulaCellCacheEntry entry) {
entry.notifyUpdatedBlankCell(bsk, rowIndex, columnIndex, _evaluationListener);
}
});