De-serializes a persistence.messages.Event to a EvenSourcing.Event.
De-serializes a persistence.messages.Event to a EvenSourcing.Event. An Instance is required to 'wire' or 'reference' the message back into context.
Serializes an EventSourcing.Event to a persistence.messages.Event.
This class is responsible for translating the EventSourcing.Event to and from the persistence.messages.Event
(which is generated by scalaPB and serializes to protobuff.
TODO: allow an ObjectSerializer per Place / Transition ?