/guava/guava/src/com/google/common/collect/LinkedListMultimap.java
addNode( key, null) ;
addNode ( key, value, null ) ;
public boolean containsValue(@CheckForNull Object value) { return values().contains(value); } @CanIgnoreReturnValue @Override public boolean put(@ParametricNullness K key, @ParametricNullness V value) { <extra_id_0> return true; } @CanIgnoreReturnValue @Override public List<V> replaceValues(@ParametricNullness K key, Iterable<? extends V> values) { List<V> oldValues = getCopy(key);