/guava/android/guava/src/com/google/common/collect/Synchronized.java
return ( SortedSet<E> ) super.delegate ( ) ;
implements SortedSet<E> { SynchronizedSortedSet(SortedSet<E> delegate, @CheckForNull Object mutex) { super(delegate, mutex); } @Override SortedSet<E> delegate() { <extra_id_0> } @Override @CheckForNull public Comparator<? super E> comparator() { synchronized (mutex) { return delegate().comparator();