protected abstract void onBrokerAvailable(BindingAwareBroker broker, BundleContext context);
protected void onBrokerRemoved(BindingAwareBroker broker, BundleContext context) {
protected abstract void onBrokerAvailable(BindingAwareBroker broker, BundleContext context);
protected void onBrokerRemoved(BindingAwareBroker broker, BundleContext context) {