twitter/finagle — pull request #118 by mosesn (2012-11-06 19:08:50+00:00)
Title: collection.Set => collection.immutable.Set per #116

## motivation
immutable.Set is the default Set, so if it's described as collection.Set, you can't just say the return value of something that returns a client.sMembers is a Future[Set[ChannelBuffer]], it's a Future[scala.collection.Set[ChannelBuffer]]. There is also no reason to create ambiguity as to whether it's immutable or not, because it makes much more sense for the api to return an immutable version.

## implementation
changed all references of collection.Set to collection.immutable.Set. Also changed the imported name from CollectionSet to ImmutableSet. I cannot use the native "Set" name for the class because it is obscured by the Set Command class in finagle-redis.