code: private function transactKillSwitch(callable $operation)
      {
          $ksPath = $this->bootstrapProfile->getKillSwitchPath();
          if ($ksPath === null) {
              throw new Exception\LogicException('No kill switch has been configured');
          }
          $lock = Lock::acquire();
          $kswitch = new KillSwitch($ksPath);
          $retval = call_user_func($operation, $kswitch);
          $kswitch->save();
          $lock->release();
  
          return ($retval !== null) ? $retval : $this;
      }
docs: @param callable $operation
  
  @throws Exception\LogicException
  
  @return mixed|$this