code>
 object in any client.

 <p>
 An unshared durable subscription is identified by a name specified by the client and by the client identifier, which
 must be set. An application which subsequently wishes to create a consumer on that non-shared durable subscription
 must use the same client identifier.

 <p>
 If an unshared durable subscription already exists with the same name and client identifier and the same topic and
 message selector, and there is no consumer already active (i.e. not closed) on the