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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_perm_name(cls, resource, method):
 """ Compose permission name @param resource the resource @param method the request method (case doesn't matter). """


        return '%s_%s_%s' % (
            cls.PREFIX,
            cls._get_resource_name(resource),
            method.lower())