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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 get_translations(self, obj, language=None):
 """ Shorcut method to retrieve translations for a given object. """

        lookup = {"identifier": obj.linguist_identifier, "object_id": obj.pk}

        if language is not None:
            lookup["language"] = language

        return self.get_queryset().filter(**lookup)