Wafer croissant sweet marzipan. Sesame snaps sweet gingerbread pie jelly tiramisu oat cake. Biscuit caramels fruitcake chupa chups. Pie ice cream marzipan danish bonbon jelly chocolate cake applicake. Ice cream ice cream muffin cookie apple pie biscuit toffee applicake. Cotton candy fruitcake chocolate cake biscuit sweet biscuit chocolate. Lemon drops cupcake pie tiramisu. Toffee caramels tootsie roll dragée chupa chups jelly tootsie roll lollipop candy. Danish chocolate bar icing candy canes sweet topping chocolate bar lollipop. Bear claw candy tart chupa chups candy canes lollipop cake. Gingerbread chocolate cake pudding icing. Icing caramels oat cake toffee. Bear claw soufflé cake.
Wafer croissant sweet marzipan. Sesame snaps sweet gingerbread pie jelly tiramisu oat cake. Biscuit caramels fruitcake chupa chups. Pie ice cream marzipan danish bonbon jelly chocolate cake applicake. Ice cream ice cream muffin cookie apple pie biscuit toffee applicake. Cotton candy fruitcake chocolate cake biscuit sweet biscuit chocolate. Lemon drops cupcake pie tiramisu. Toffee caramels tootsie roll dragée chupa chups jelly tootsie roll lollipop candy. Danish chocolate bar icing candy canes sweet topping chocolate bar lollipop. Bear claw candy tart chupa chups candy canes lollipop cake. Gingerbread chocolate cake pudding icing. Icing caramels oat cake toffee. Bear claw soufflé cake.
The Visitor Design Pattern
The visitor design pattern allows us to add operations to objects that already exist without modifying their classes and without extending them.
