package org.apidesign.sidemeanings;

 public abstract class Public {

     int counter;

     Public() {}

     public abstract void increment();

     public final void incrementTenTimes() {

         for (int i = 0; i < 10; i++) {

             increment();

         }

     }

     public final void assertCounter(int expected) {

         assert expected == counter : "Expected " + expected + " but was " + counter;

     }

     public static abstract class Dirty extends Public {

         // BEGIN: sidemeanings.Public.Dirty

         public void increment() {

             // internal implementation

             counter++;

         }

         // END: sidemeanings.Public.Dirty

     }

     public static abstract class Clean extends Public {

         // BEGIN: sidemeanings.Public.Clean

         public final void increment() {

             overridableIncrement();

         }

         protected abstract void overridableIncrement();

         protected final void defaultIncrement() {

             counter++;

         }

         // END: sidemeanings.Public.Clean

     }

 }