void setNotifiedOfRetract(boolean notifyRetract) {
        this.notifyRetract = notifyRetract;
    }
Sets whether subscribers will be notified when items are removed from the node.

@param notifyRetract true if subscribers will be notified when items are removed from
       the node.
xmppserver/src/main/java/org/jivesoftware/openfire/pubsub/Node.java