# File lib/fog/aws/models/iam/user.rb, line 30
        def detach(policy_or_arn)
          requires :identity

          arn = if policy_or_arn.respond_to?(:arn)
                  policy_or_arn.arn
                else
                  policy_or_arn
                end

          service.detach_user_policy(self.identity, arn)
        end