Defining the Template Method pattern

As we saw in the previous chapter, Behavioral patterns focus on the responsibilities that an object has. It deals with the interaction among objects to achieve larger functionality. The Template Method pattern is a behavioral design pattern that defines the program skeleton or an algorithm in a method called the Template Method. For example, you could define the steps to prepare a beverage as an algorithm in a Template Method. The Template Method pattern also helps redefine or customize certain steps of the algorithm by deferring the implementation of some of these steps to subclasses. This means that the subclasses can redefine their own behavior. For example, in this case, subclasses can implement steps to prepare tea using the Template Method to prepare a beverage. It is important to note that the change in the steps (as done by the subclasses) don't impact the original algorithm's structure. Thus, the facility of overriding by subclasses in the Template...