IsCountryCode
Determines whether a given input is a valid country code.
This class extends the Function class and provides a method to check if a given input represents a valid country code. The implementation follows the specified validation rules.
The IsCountryCode class is meant to be instantiated and used to validate country codes. It inherits common functionality from the Function base class.
Constructors
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constructor()
Creates an instance of the IsCountryCode class.