/guava/guava/src/com/google/common/collect/Synchronized.java
return ( Set<E> ) super.delegate ( ) ;
implements Set<E> { SynchronizedSet(Set<E> delegate, @CheckForNull Object mutex) { super(delegate, mutex); } @Override Set<E> delegate() { <extra_id_0> } @Override public boolean equals(@CheckForNull Object o) { if (o == this) { return true; }