private FilteringCollectionWrapper(
final Collection<T> backingCollection, final Predicate<T> filter) {
Validate.notNull(backingCollection);
Validate.notNull(filter);
this.backingCollection = backingCollection;
this.filter = filter;
}
@Override
public FilteringCollectionWrapper<T> withFilter(final Predicate<T> filter) {
Validate.notNull(filter);
return new FilteringCollectionWrapper<T>(backingCollection, filter);
}