final Set<OWLAxiom> impendingAdditions = new HashSet<>();
final Set<OWLAxiom> impendingRemovals = new HashSet<>();
final Set<OWLAxiom> additions = new HashSet<>();
final Set<OWLAxiom> removals = new HashSet<>();
ont.getOWLOntologyManager().addImpendingOntologyChangeListener(
new ImpendingOWLOntologyChangeListener() {
private static final long serialVersionUID = 40000L;
@Override
public