/guava/guava/src/com/google/common/collect/Synchronized.java
if ( collection instanceof SortedSet) {   return sortedSet( ( ( SortedSet<E>) ( collection) ) , mutex) ; }
[Delete]
return list((List<E>) collection, mutex); } return collection(collection, mutex); } private static <E extends @Nullable Object> Set<E> typePreservingSet( Set<E> set, @CheckForNull Object mutex) { <extra_id_0> return sortedSet((SortedSet<E>) set, mutex); } else { return set(set, mutex); } } static final class SynchronizedAsMapEntries<