def CheckInitialized(self):
    super(ConnectorOptions, self).CheckInitialized()

    if self.column_list:

      self.column_list = [str(column) for column in self.column_list]
Post-loading 'validation'. Really used to fix up yaml hackyness.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/bulkload/bulkloader_parser.py/ConnectorOptions.CheckInitialized