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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 unfold_subtitle_stub(self, subtitle_stub):
 """Turn a SubtitleStub into a full Subtitle object @param crunchyroll.models.SubtitleStub subtitle_stub @return crunchyroll.models.Subtitle """

        return Subtitle(self._ajax_api.Subtitle_GetXml(
            subtitle_script_id=int(subtitle_stub.id)))