public void setNotifyRetract(boolean notifyRetract) {
        this.notifyRetract = notifyRetract;
    }
Sets if subscribers are going to be notified when items are removed from the node.

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