rable subscriptions. Any durable subscription created using this
 method will be non-shared. This means that only one active (i.e. not closed) consumer on the subscription may exist
 at a time. The term "consumer" here means a <code>TopicSubscriber</code>, <code>MessageConsumer</code> or <code>JMSConsumer</code>
 object in any client.

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 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 wis