def Rollback(self):
    if self.args:
      self.parser.error('Expected a single <directory> or <file> argument.')
    self._Rollback()
Called by Django before deciding which view to execute.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/appcfg.py/AppCfgApp.Rollback--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/appstats/recording.py/AppstatsDjangoMiddleware.process_request