Kraken\Channel\Model\Zmq\Connection\ConnectionPool::isHeartbeatNeeded PHP Метод

    public function isHeartbeatNeeded($id)
    {
        if (!$this->existsConnection($id)) {
            return true;
        }
        return $this->validateOut($this->generateConst(), $this->getConnection($id));
    }

 /**
  * @param string $id
  * @return bool
  */
 private function heartbeat($id)
 {
     if ($this->connectionPool->isHeartbeatNeeded($id) === true) {
         return $this->sendMessage($id, self::COMMAND_HEARTBEAT);
     }
     return false;
 }