/guava/guava/src/com/google/common/collect/Synchronized.java
return delegate( ).toArray( e) ;
return delegate ( ) .add ( e ) ;
Collection<E> delegate() { return (Collection<E>) super.delegate(); } @Override public boolean add(E e) { synchronized (mutex) { <extra_id_0> } } @Override public boolean addAll(Collection<? extends E> c) { synchronized (mutex) { return delegate().addAll(c);