'Returns a sort, if the link or its subreddit has suggested one.'

def sort_if_suggested(self, sr=None):

    if (self.suggested_sort == 'blank'):
        return None
    if self.suggested_sort:
        return self.suggested_sort
    sr = (sr or self.subreddit_slow)
    if sr.suggested_comment_sort:
        return sr.suggested_comment_sort
    return None
