/guava/android/guava/src/com/google/common/collect/Maps.java
return backingSet( ) .entrySet( ) ;
return backingSet ( ) .comparator ( ) ;
SortedSet<K> backingSet() { return (SortedSet<K>) super.backingSet(); } @Override @CheckForNull public Comparator<? super K> comparator() { <extra_id_0> } @Override public Set<K> keySet() { return removeOnlySortedSet(backingSet()); } @Override