code: def list_presubscriptions(self, **kwargs):
          
          api = self._get_api(mds.SubscriptionsApi)
          resp = api.get_pre_subscriptions(**kwargs)
          return [Presubscription(p) for p in resp]
docs: Get a list of pre-subscription data
  
          :returns: a list of `Presubscription` objects
          :rtype: list of mbed_cloud.presubscription.Presubscription