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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 list_presubscriptions(self, **kwargs):
 """Get a list of pre-subscription data :returns: a list of `Presubscription` objects :rtype: list of mbed_cloud.presubscription.Presubscription """

        api = self._get_api(mds.SubscriptionsApi)
        resp = api.get_pre_subscriptions(**kwargs)
        return [Presubscription(p) for p in resp]