private void enableListening(IPostScanBehaviour ipsb, boolean listen) {
if(ipsb == null) return;
PostScanBehaviourModel psbm = (PostScanBehaviourModel) ipsb;
if(listen) {
psbm.addListener(listenerPostScanBehaviour);
} else {
psbm.removeListener(listenerPostScanBehaviour);
}
}