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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_queryset(self):
 """ We just ensure preferences are actually populated before fetching from db """

        self.init_preferences()
        queryset = super(PreferenceViewSet, self).get_queryset()

        section = self.request.query_params.get('section')
        if section:
            queryset = queryset.filter(section=section)

        return queryset