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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 modify_storage(self, storage, size, title, backup_rule={}):
 """ Modify a Storage object. Returns an object based on the API's response. """

        res = self._modify_storage(str(storage), size, title, backup_rule)
        return Storage(cloud_manager=self, **res['storage'])