code: public void start() throws Exception {
          tracker = new ServiceTracker<ProxyTargetLocatorFactory, ProxyTargetLocatorFactory>(bundleContext,
              ProxyTargetLocatorFactory.class, null);
          tracker.open();
          bundleInjectionProviderHelper =
              new BundleInjectionProviderHelper(bundleContext, applicationName, injectionSource, tracker);
          bundleInjectionProviderHelper.register();
      }
docs: <p>start.</p>
  
  @throws java.lang.Exception if any.