Watch the following video to understand how we develop it with Adapter pattern.
Add a support of one another format in the default AudioPlayer
Add two more classes each one support another format of the audio that implements AdvancedMediaPlayer and then utilize them from the main method.
Simplify the AdvancedMediaPlayer interface such that dummy methods are not required to be implemented in the concrete player class. For example PlayVlc method in Mp4Player class is with a dummy definition and not in use.
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