@Override
 public void visit(OWLInverseObjectPropertiesAxiom axiom) {
   write(axiom.getFirstProperty());
   writeSpace();
   write(EQUIV);
   writeSpace();
   write(axiom.getSecondProperty());
   write("\\ensuremath{^-}");
 }
 @Override
 public void visit(OWLInverseObjectPropertiesAxiom axiom) {
   axiom.getFirstProperty().accept(this);
   OWLObjectPropertyExpression propA = (OWLObjectPropertyExpression) obj;
   axiom.getSecondProperty().accept(this);
   OWLObjectPropertyExpression propB = (OWLObjectPropertyExpression) obj;
   obj =
       dataFactory.getOWLInverseObjectPropertiesAxiom(
           propA, propB, duplicateAxiomAnnotations(axiom));
 }
 public void visit(OWLInverseObjectPropertiesAxiom axiom) {
   axiom.getFirstProperty().accept(this);
   axiom.getSecondProperty().accept(this);
   processAxiomAnnotations(axiom);
 }