/guava/guava/src/com/google/common/collect/Synchronized.java
return delegate ( ) .last ( ) ;
return delegate().first(); } } @Override public E last() { synchronized (mutex) { <extra_id_0> } } private static final long serialVersionUID = 0; } private static <E extends @Nullable Object> List<E> list( List<E> list, @CheckForNull Object mutex) {