146     def start(self):

   146     def start(self):

   147         pass

   147         pass

   148 

   148 

   149     def stop(self):

   149     def stop(self):

   150         pass

   150         pass

   151 

   152 

   152 class _CnxSetPool(object):

   153 class _CnxSetPool(object):

   153 

   154 

   154     def __init__(self, source, size):

   155     def __init__(self, source, size):

   155         self._cnxsets = []

   156         self._cnxsets = []