|   | Examples 8.11.3.4: |  | 
The features of the required library class PHONE_NO are used in individual examples here. None of the examples given is a complete class nor necessarily a 'complete' method.
In all of the examples it will be assumed that the code shown is in a class called, say, EXAMPLE.
This feature returns a telephone number object in which all of the detail components (which are effectively attributes) are void, thus -
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