package api;

 // BEGIN: instanceof.class.InstanceProvider2

 public final class InstanceProvider {

     private final Object instance;

     public InstanceProvider(Object instance) {

         this.instance = instance;

     }

     public Class<?> instanceClass() {

         return instance.getClass();

     }

     public Object instanceCreate() {

         return instance;

     }

     /** @since 2.0 */

     public boolean isInstanceOf(Class<?> c) {

         if (Helper.knownHowToDoItBetter()) {

             return Helper.computeTheResultOfIsInstanceOfInSomeBetterWay(c);

         } else {

             // fallback

             return c.isAssignableFrom(instanceClass());

         }

     }

 }

 // END: instanceof.class.InstanceProvider2

 class Helper {

     static boolean computeTheResultOfIsInstanceOfInSomeBetterWay(Class<?> c) {

         return false;

     }

     static boolean knownHowToDoItBetter() {

         return false;

     }

 }