package org.apidesign.sidemeanings;

 // BEGIN: sidemeanings.Mixed.Dirty

 public abstract class MixedClass {

     private int counter;

     private int sum;

     protected MixedClass() {

         super();

     }

     public final int apiForClients() {

         int subclass = toBeImplementedBySubclass();

         sum += subclass;

         return sum / counter;

     }

     protected abstract int toBeImplementedBySubclass();

     protected final void toBeCalledBySubclass() {

         counter++;

     }

 }

 // END: sidemeanings.Mixed.Dirty