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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_implementation(cls, force: bool = False) -> AxesHandler: """ Fetch and initialize configured handler implementation and memoize it to avoid reinitialization. This method is re-entrant and can be called multiple times from e.g. Django application loader. """


        if force or not cls.implementation:
            cls.implementation = import_string(settings.AXES_HANDLER)()
        return cls.implementation