class ConcurrentHashMultimap implements Multimap<K, V> {

    @Override
    public boolean put(@Nullable K key, @Nullable V value) {
        Preconditions.checkNotNull(key);
        Preconditions.checkNotNull(value);
        return putWithConflictResolution(key, value, defaultConflictResolver);
    }

    public  ConcurrentHashMultimap(ValueIdentityExtractor<V> valueIdentityExtractor, ConflictResolver<V> conflictResolver);

}