package com.iluwatar.callback;

/**
 * 
 * Implementation of task that need to be executed
 * 
 */
public class SimpleTask extends Task {

	@Override
	public void execute() {
		System.out.println("Perform some important activity.");
	}

}

@@ -221,16 +221,51 @@
 activity
+ and after call the callback method
 .%22);%0A%09%7D%0A

Add unit test to show that the callback method is called.