code: public NodeSet<OWLClass> getFillers(OWLClassExpression ce, OWLObjectPropertyExpression property) {
          return getFillers(ce, Arrays.asList(property));
      }
docs: Gets the fillers of the existential restrictions that are entailed to be superclasses the specified class
  expression and act along the specified property.  In essence, this finds bindings for ?x with respect to
  the following template: <code>SubClassOf(ce ObjectSomeValuesFrom(property, ?x))</code>
  
  @param ce       The class expression.  Not {@code null}.
  @param property The property expression.  Not {@code null}.
  @return A set of class expressions that are the entailed fillers of entailed existential restriction superclasses.