/** Adds the listener with the given class name to this ServletContext. */
 @Override
 public void addListener(String className) {
   if (SecurityUtil.isPackageProtectionEnabled()) {
     doPrivileged("addListener", new Object[] {className});
   } else {
     context.addListener(className);
   }
 }
 /** Adds a listener of the given class type to this ServletContext. */
 @Override
 public void addListener(Class<? extends EventListener> listenerClass) {
   if (SecurityUtil.isPackageProtectionEnabled()) {
     doPrivileged(
         "addListener", new Class[] {Class.class}, new Object[] {listenerClass.getName()});
   } else {
     context.addListener(listenerClass);
   }
 }
 /** Adds the given listener to this ServletContext. */
 @Override
 public <T extends EventListener> void addListener(T t) {
   if (SecurityUtil.isPackageProtectionEnabled()) {
     doPrivileged(
         "addListener", new Class[] {EventListener.class}, new Object[] {t.getClass().getName()});
   } else {
     context.addListener(t);
   }
 }