public Pair(O anOWLObject, O anotherOWLObject) {
if (anOWLObject == null) {
throw new NullPointerException("The first memebr of this pair cannot be null");
}
if (anotherOWLObject == null) {
throw new NullPointerException("The second memebr of this pair cannot be null");
}
if (anotherOWLObject.equals(anOWLObject)) {
throw new IllegalArgumentException("The pair is meant to be made of two distic entities");
}
this.members.add(anOWLObject);
this.members.add(anotherOWLObject);
}
