public class WalkablesTest 
{
    public static void main(String[] args) 
    {
        Person[] persons = new Person[3];
        persons[0] = new Person("Jack");
        persons[1] = new Person("Jeff");
        persons[2] = new Person("John");
        
        // Let everyone walk
        Walkables.letThemWalk(persons);
    }
}