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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 save_many(self, models, joinings=None):
 """ Save a list of new models and attach them to the parent model :type models: list :type joinings: dict :rtype: list """

        if joinings is None:
            joinings = {}

        for key, model in enumerate(models):
            self.save(model, joinings.get(key), False)

        self.touch_if_touching()

        return models