def back(self):
        if not len(self.backout):
            raise TemplateSyntaxError, "back called without some previous parsing"
        self.pointer = self.backout.pop()
/api/package/<pkg>/<filename> requires write perms
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-0.96/django/template/__init__.py/TokenParser.back--crossover with--dataset/ETHPy150Open mathcamp/pypicloud/tests/test_security.py/TestEndpointSecurity.test_api_pkg_versions_authed