def visible(self):
        visible = self.all()
        if not settings.COMMENTS_UNAPPROVED_VISIBLE:
            visible = visible.filter(is_public=True)
        if not settings.COMMENTS_REMOVED_VISIBLE:
            visible = visible.filter(is_removed=False)
        return visible
Return the comments that are visible based on the
dataset/ETHPy150Open stephenmcd/mezzanine/mezzanine/generic/managers.py/CommentManager.visible