akka.actor.mailbox
Interfaces 
DurableMailboxSettings
DurableMessageSerialization
Classes 
DurableExecutableMailboxConfig
DurableExecutableMailboxConfig$
DurableMailboxSpec
DurableMailboxSpec$
DurableMailboxSpecActorFactory
DurableMailboxSpecActorFactory.AccumulatorActor
DurableMailboxSpecActorFactory.MailboxTestActor
DurableMailboxSpecActorFactory$
DurableMessageQueue
DurableMessageQueueWithSerialization