/**
* Returns <code>true</code> if the registry contains the given object pair. Used by the
* reflection methods to avoid infinite loops. Objects might be swapped therefore a check is
* needed if the object pair is registered in given or swapped order.
*
* @param lhs <code>this</code> object to lookup in registry
* @param rhs the other object to lookup on registry
* @return boolean <code>true</code> if the registry contains the given object.
* @since 3.0
*/
static boolean isRegistered(Object lhs, Object rhs) {
Set<Pair<IDKey, IDKey>> registry = getRegistry();
Pair<IDKey, IDKey> pair = getRegisterPair(lhs, rhs);
Pair<IDKey, IDKey> swappedPair = Pair.of(pair.getLeft(), pair.getRight());
return registry != null && (registry.contains(pair) || registry.contains(swappedPair));
}
