code: public void stop() {
          for (PluginWrapper p : activePlugins) {
              p.stop();
              p.releaseClassLoader();
          }
          activePlugins.clear();
          // Work around a bug in commons-logging.
          // See http://www.szegedi.org/articles/memleak.html
          LogFactory.release(uberClassLoader);
      }
docs: Orderly terminates all the plugins.