//1. Create visitor class
public interface Visitor
{
	public void visit(Body b);
}

public class DooVisitor implements Visitor
{
//2. Make instance of visitor in new class
	public static DooVisitor dv = new DooVisitor();

//4. Move Methods leaving delegate behind
//5. Rename methods in visitor class to visit
	public void visit(Body b) {
		System.out.println("Body does " + b.role);
	}
}



public interface CarElement
{
	public void accept(DooVisitor v);
}

//3. Add visitor-type parameter to OG classes
public class Body implements CarElement
{
	public String role = "protect passengers";

//4. Move Methods leaving behind delegate method
//5. Rename methods in OG class to accept
	public void accept(DooVisitor v) {
		v.visit(this);
	}
}