private static void close(Closeable closeable) {
    if (closeable != null) {
      try {
        closeable.close();
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  }
Classloader, which allows finding classes in jars within jars. This is used to check whether a
listener, as found in web.xml, is a ServletContextListener
extensions/geode-modules-session/src/main/java/org/apache/geode/modules/session/installer/JarClassLoader.java