private ServiceTracker<DumpProvider, DumpProvider> providersTracker;
@Override
public void start(final BundleContext context) throws Exception {
registrations = new ArrayList<ServiceRegistration<DumpProvider>>();
registrations.add(context.registerService(DumpProvider.class, new LogDumpProvider(context), null));
featuresServiceTracker = new SingleServiceTracker<FeaturesService>(context, FeaturesService.class, new SingleServiceTracker.SingleServiceListener() {
@Override
public void serviceFound() {
featuresProviderRegistration =