public JID getOwner() {
        return owner;
    }
Returns the JID of the entity that owns this subscription. The owner entity will have
a {@link NodeAffiliate} for the owner JID. The owner may have more than one subscription
with the node based on what this message
{@link org.jivesoftware.openfire.pubsub.Node#isMultipleSubscriptionsEnabled()}.

@return he JID of the entity that owns this subscription.
xmppserver/src/main/java/org/jivesoftware/openfire/pubsub/NodeSubscription.java