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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_prefetched_translations(self, meta=None):
 """ Return the queryset with prefetch results. """

        if meta is None:
            meta = self._parler_meta.root

        related_name = meta.rel_name
        try:
            # Read the list directly, avoid QuerySet construction.
            # Accessing self._get_translated_queryset(parler_meta)._prefetch_done is more expensive.
            return self._prefetched_objects_cache[related_name]
        except (AttributeError, KeyError):
            return None