An optimization for stateful retry of message processing. If a message is known to be "new", i.e. never consumed
before by this or any other client, then there are potential optimizations for managing the state associated with
tracking the processing of a message (e.g. there is no need to check a cache for a hit).
Query a message to see if it has been seen before. Usually it is only possible to know if it has definitely not
been seen before (e.g. through the redelivered flag, which would be used by default). Clients can customize the
retry behaviour for failed messages by implementing this method.
message - the message to test
true if the message is known to not have been consumed before