protected boolean isMetricInvalidated(List<? extends OWLOntologyChange> changes) {
for(OWLOntologyChange change : changes) {
if(change.isAxiomChange()) {
OWLAxiomChange axChg = (OWLAxiomChange) change;
if(axChg.getAxiom() instanceof OWLImportsDeclaration) {
return true;
}
}
}
return false;