code: def get_model(self, model, model_id):
          
          return self._store.find_record(self._get_model_class(model), int(model_id))
docs: Get a single model from the server.
  
          Args:
              model (string): The class as a string.
              model_id (string): The integer ID as a string.
  
          Returns:
              :class:`cinder_data.model.CinderModel`: A instance of the model.