@Override
    public void presenceSubscriptionRequired(Node node, JID user) {
        PubSubEngine.presenceSubscriptionRequired(this, node, user);
    }
Returns the permission policy for creating nodes. A true value means that not anyone can create a node,
only the service admin.

Note that PEP services will always return 'true'.

@return true
xmppserver/src/main/java/org/jivesoftware/openfire/pep/PEPService.java