/guava/android/guava/src/com/google/common/collect/Synchronized.java
return sortedSet( delegate( ).subSet( fromElement, toElement) , null) ;
return sortedSet ( delegate ( ) .subSet ( fromElement, toElement ) , mutex ) ;
return delegate().comparator(); } } @Override public SortedSet<E> subSet(E fromElement, E toElement) { synchronized (mutex) { <extra_id_0> } } @Override public SortedSet<E> headSet(E toElement) { synchronized (mutex) { return sortedSet(delegate().headSet(toElement), mutex);