diff -r 4bf599099de7 -r 40cabcdcd2be samples/sidemeanings/src/org/apidesign/sidemeanings/Public.java
--- a/samples/sidemeanings/src/org/apidesign/sidemeanings/Public.java	Sat Jun 14 09:54:19 2008 +0200
+++ b/samples/sidemeanings/src/org/apidesign/sidemeanings/Public.java	Thu Oct 30 21:30:10 2014 +0100
@@ -1,27 +1,41 @@
 package org.apidesign.sidemeanings;
 
-public final class Public {
-    private Public() {}
+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 abstract class Dirty {
+    public static abstract class Dirty extends Public {
         // BEGIN: sidemeanings.Public.Dirty
-        public void method() {
-            someCode();
+        public void increment() {
+            // internal implementation
+            counter++;
         }
         // END: sidemeanings.Public.Dirty
-        private void someCode() {
-        }
     }
     
     
-    public abstract class Clean {
+    public static abstract class Clean extends Public {
         // BEGIN: sidemeanings.Public.Clean
-        public final void method() {
-            methodImpl();
+        public final void increment() {
+            overridableIncrement();
         }
-        protected abstract void methodImpl();
-        protected final void someCode() {
+        protected abstract void overridableIncrement();
+        protected final void defaultIncrement() {
+            counter++;
         }
         // END: sidemeanings.Public.Clean
     }