/guava/android/guava/src/com/google/common/collect/ImmutableSetMultimap.java
ImmutableSet<V> set = valueSet( valueComparator) ;
ImmutableSet<V> set = valueSet ( valueComparator, values ) ;
ImmutableMap.Builder<K, ImmutableSet<V>> builder = new ImmutableMap.Builder<>(mapEntries.size()); int size = 0; for (Entry<? extends K, ? extends Collection<? extends V>> entry : mapEntries) { K key = entry.getKey(); Collection<? extends V> values = entry.getValue(); <extra_id_0> if (!set.isEmpty()) { builder.put(key, set); size += set.size(); } } return new ImmutableSetMultimap<>(builder.buildOrThrow(), size, valueComparator);