1. akka
   1. akka.pattern
2. com
   1. com.lightbend
      1. com.lightbend.lagom
         1. com.lightbend.lagom.scaladsl
            1. com.lightbend.lagom.scaladsl.pubsub
               1. (trait)PubSubComponents
               2. (class)PubSubRef
               3. (trait)PubSubRegistry
               4. (object)(trait)TopicId