docs: def startCollapsedCommissioner(self):
          """start Collapsed Commissioner
  
          Returns:
              True: successful to start Commissioner
              False: fail to start Commissioner
          """
          print '%s call startCollapsedCommissioner' % self.port
          startCmd = WPANCTL_CMD + 'form %s -c %s -T router' % (self.networkName, str(self.channel))
          if self.__sendCommand(startCmd) != 'Fail':
              time.sleep(2)
              cmd = WPANCTL_CMD + 'commissioner start'
              print cmd
              if self.__sendCommand(cmd)[0] != 'Fail':
                  self.isActiveCommissioner = True
                  time.sleep(20) # time for petition process
                  return True
          return False