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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 add_personalization(self, personalization, index=0):
 """Add a Personaliztion object :param personalizations: Add a Personalization object :type personalizations: Personalization :param index: The index where to add the Personalization :type index: int """

        self._personalizations = self._ensure_append(
            personalization, self._personalizations, index)