// Object added to a blocking region
newRegionKey = ((BlockingRegion) cell.getParent()).getKey();
if (!model.addRegionStation(newRegionKey, key)) {
// object cannot be added to blocking region (for
// example it's a source)
cell.removeFromParent();
graph.getModel().insert(new Object[] { cell }, null, null, null, null);
putBack.add(cell);
}
// Doesn't allow adding of selected objects to a new
// blocking region