/guava/guava/src/com/google/common/collect/CompactHashMap.java
Map<K, V> delegate = delegateOrNull ( ) ;
action.accept(key(i)); } } } } Iterator<K> keySetIterator() { <extra_id_0> if (delegate != null) { return delegate.keySet().iterator(); } return new Itr<K>() { @Override @ParametricNullness