The helper interfaces for Builder pattern with Twist

HelperInterfaces.java

public interface Bread {

    Toast bread(String bread);
}


public interface Toast {

    Type toast(boolean toast);
}


public interface Type {

    Veg veg();

    NonVeg nonVeg();
}


public interface NonVeg {

    Veg chicken();

    Veg mutton();
}


public interface Veg {

    Veg onion();

    Veg tomato();

    Veg olives();

    Extra prepare();
}


public interface Extra {

    Extra cheese(String cheese);

    Subway build();
}