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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 subscriptions(self):
 """Fetch and return Subscriptions associated with this user."""

        if not hasattr(self, '_subscriptions'):
            subscriptions_resource = self.resource.subscriptions
            self._subscriptions = Subscriptions(
                subscriptions_resource, self.client)
        return self._subscriptions