What's the Java 8 Stream equivalent of LINQ's SelectMany?
For example, in C#, if I have Dictionary<string, List<Tag>> tags that I want to turn into an IEnumerable<Tag> (a flat enumerable of all the tags in the dictionary), I would do tags.SelectMany(kvp => kvp.Value).
Is there a Java equivalent for a Map<String, List<Tag>> that would yield a Stream<Tag>?