private static INakedObjectAssociation[] CollectionAssociations(INakedObject[] collection,
INakedObjectSpecification collectionSpec,
Func<INakedObjectAssociation, bool> filter,
Func<INakedObjectAssociation, int> order) {
IEnumerable<INakedObjectAssociation> assocs = collectionSpec.Properties.Where(filter).Where(a => collection.Any(item => a.IsVisible(NakedObjectsContext.Session, item)));
if (order != null) {
assocs = assocs.OrderBy(order);
}
return assocs.ToArray();
}