As we did with the object-oriented design, we will start off by creating a very basic diagram that shows how to design the vehicle types in a protocol-oriented way. Just like the object-oriented diagram, this will be a very basic diagram that simply shows the types themselves without much detail:
The protocol-oriented design is quite a bit different from the object-oriented design. In the object-oriented design, we started the design with the superclass, which became the focus of the design and all subclasses inherited functionality and properties from that superclass.
In the protocol-oriented ...
