code: def models(self):
          '''
          generator to return the tuple of model and its schema to create on aws.
          '''
          model_dict = self._build_all_dependencies()
          while True:
              model = self._get_model_without_dependencies(model_dict)
              if not model:
                  break
              yield (model, self._models().get(model)f models(self):
          '''
          generator to return the tuple of model and its schema to create on aws.
          '''
          model_dict = self._build_all_dependencies()
          while True:
              model = self._get_model_without_dependencies(model_dict)
              if not model:
                  break
              yield (model, self._models().get(model))
docs: generator to return the tuple of model and its schema to create on aws.