def back(self):
        if not len(self.backout):
            raise TemplateSyntaxError("back called without some previous parsing")
        self.pointer = self.backout.pop()
Write multiplexed data to the sideband.
dataset/ETHPy150Open dcramer/django-compositepks/django/template/__init__.py/TokenParser.back--crossover with--dataset/ETHPy150Open natestedman/Observatory/observatory/lib/dulwich/protocol.py/Protocol.write_sideband