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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 never_cache_preview(self, response):
 """ Ensure preview is never cached """

        response.cache_control.max_age = 0
        response.cache_control.no_cache = True
        response.cache_control.must_revalidate = True
        response.cache_control.no_store = True
        return response