* When an actor which is derived from RaftActor attempts to persistData it
* must pass an instance of the Payload class. Similarly when state needs to
* be applied to the derived RaftActor it will be passed an instance of the
* When an actor which is derived from RaftActor attempts to persistData it
* must pass an instance of the Payload class. Similarly when state needs to
* be applied to the derived RaftActor it will be passed an instance of the