@Override
public Picture addPicture(ClientAnchor anchor, byte[] image, int format) {
synchronized (_sheet) {
DrawingManager dm = ((SheetCtrl)_sheet).getDrawingManager();
final Picture picture = dm.addPicture(_sheet, anchor, image, format);
final RangeImpl rng = (RangeImpl) Ranges.range(_sheet, anchor.getRow1(), anchor.getCol1(), anchor.getRow2(), anchor.getCol2());
final Collection<Ref> refs = rng.getRefs();
if (refs != null && !refs.isEmpty()) {
final Ref ref = refs.iterator().next();
BookHelper.notifyPictureAdd(ref, picture);