docs: def __stopOpenThreadWpan(self):
          """stop OpenThreadWpan
  
          Returns:
              True: successfully stop OpenThreadWpan
              False: failed to stop OpenThreadWpan
          """
          print 'call stopOpenThreadWpan'
          try:
              if self.__sendCommand(WPANCTL_CMD + 'leave')[0] != 'Fail' and self.__sendCommand(WPANCTL_CMD + 'dataset erase')[0] != 'Fail':
                  return True
              else:
                  return False
          except Exception, e:
              ModuleHelper.WriteIntoDebugLogger('stopOpenThreadWpan() Error: ' + str(e))