/guava/android/guava/src/com/google/common/collect/Multimaps.java
if ( collection instanceof List) {   return unmodifiableList( ( ( List<V>) ( collection) ) ) ; }
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Collection<E> collection) { if (collection instanceof NavigableSet) { return Sets.unmodifiableNavigableSet((NavigableSet<E>) collection); } else if (collection instanceof SortedSet) { return Collections.unmodifiableSortedSet((SortedSet<E>) collection); } else if (collection instanceof Set) { <extra_id_0> } else if (collection instanceof List) { return Collections.unmodifiableList((List<E>) collection); } else { return Collections.unmodifiableCollection(collection); } }