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

    if self.column_list:

      self.column_list = [str(column) for column in self.column_list]
The mountpoint is world-writeable (since containers can run as any
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/bulkload/bulkloader_parser.py/ConnectorOptions.CheckInitialized--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/test/test_blockdevice.py/MountBlockDeviceTests.test_mountpoint_permissions