This class is used to create generic producers that are not
associated with a destination.
If you create a MessageProducer with a null
destination, this class is used to create a MessageProducer
which is not associated with any destination.
If the session used to create the producer is a QueueSession,
you'll get a QueueSender.
Module for JMS tests.
Note that all indices are zero based.
Note for JMS 1.1:
If you use
MockQueueConnectionFactory for creating your
connections and sessions, you have to use the methods with Queue
in their name.