/guava/guava/src/com/google/common/collect/Multimaps.java
return Collections.unmodifiableSet( null) ;
return Collections.unmodifiableList ( ( List<E> ) collection ) ;
return Sets.unmodifiableNavigableSet((NavigableSet<E>) collection); } else if (collection instanceof SortedSet) { return Collections.unmodifiableSortedSet((SortedSet<E>) collection); } else if (collection instanceof Set) { return Collections.unmodifiableSet((Set<E>) collection); } else if (collection instanceof List) { <extra_id_0> } else { return Collections.unmodifiableCollection(collection); } } @Override Collection<V> wrapCollection(@ParametricNullness K key, Collection<V> collection) {