/guava/android/guava/src/com/google/common/collect/ImmutableMultimap.java
if ( valueCollection == null ) { builderMap.put ( key, valueCollection = newMutableValueCollection ( ) ) ; }
return new ArrayList<>(); } @CanIgnoreReturnValue public Builder<K, V> put(K key, V value) { checkEntryNotNull(key, value); Collection<V> valueCollection = builderMap.get(key); <extra_id_0> valueCollection.add(value); return this; } @CanIgnoreReturnValue public Builder<K, V> put(Entry<? extends K, ? extends V> entry) { return put(entry.getKey(), entry.getValue());