code: private void trackHttpContexts(final BundleContext bundleContext, ExtendedHttpServiceRuntime httpServiceRuntime) {
  		final ServiceTracker<HttpContext, HttpContextElement> httpContextTracker = HttpContextTracker
  				.createTracker(extenderContext, bundleContext, httpServiceRuntime);
  
  		httpContextTracker.open();
  		trackers.add(0, httpContextTracker);
  
  		final ServiceTracker<HttpContextMapping, HttpContextElement> httpContextMappingTracker = HttpContextMappingTracker
  				.createTracker(extenderContext, bundleContext, httpServiceRuntime);
  
  		httpContextMappingTracker.open();
  		trackers.add(0, httpContextMappingTracker);
  	}
docs: Track http contexts.
  
  @param bundleContext the BundleContext associated with this bundle
  @param httpServiceRuntime