}
// Avoid insertion of a blocking region in an other
else if (cell2 instanceof BlockingRegion) {
BlockingRegion region = (BlockingRegion) cell2;
if (region.getParent() != null) {
region.removeFromParent();
graph.getModel().insert(new Object[] { region }, null, null, null, null);
}
}
}
// Puts cells removed from blocking regiont on background