/guava/guava/src/com/google/common/collect/CompactHashMap.java
action.accept( key( oldEntry) ) ;
action.accept ( key ( i ) ) ;
checkNotNull(action); Map<K, V> delegate = delegateOrNull(); if (delegate != null) { delegate.keySet().forEach(action); } else { for (int i = firstEntryIndex(); i >= 0; i = getSuccessor(i)) { <extra_id_0> } } } } Iterator<K> keySetIterator() { Map<K, V> delegate = delegateOrNull();