code: def storage(self, provider='osfstorage'):
          
          stores = self._json(self._get(self._storages_url), 200)
          stores = stores['data']
          for store in stores:
              provides = self._get_attribute(store, 'attributes', 'provider')
              if provides == provider:
                  return Storage(store, self.session)
  
          raise RuntimeError("Project has no storage "
                             "provider '{}'".format(provider))
docs: Return storage `provider`.