tracker = new ExtensionPointTracker(registry, HTTPCONTEXTS_EXTENSION_POINT, null);
tracker = new ExtensionPointTracker(registry, HTTPCONTEXTS_EXTENSION_POINT, this);
	public HttpContextManager(HttpService httpService, PackageAdmin packageAdmin, IExtensionRegistry registry) {		this.httpService = httpService;		this.packageAdmin = packageAdmin;		tracker = new ExtensionPointTracker(registry, HTTPCONTEXTS_EXTENSION_POINT, null);	}