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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_filtered_feed(self, feed_filter):
 """Get your feed containing only posts filtered by ``feed_filter`` :type feed_filter: FeedFilter :param feed_filter: Must be an instance of either: UnreadFilter, FollowingFilter, or FolderFilter :rtype: dict """

        assert isinstance(feed_filter, (UnreadFilter, FollowingFilter,
                                        FolderFilter))
        return self._rpc.filter_feed(**feed_filter.to_kwargs())