code: public function send($data): bool
      {
          $dataLength = strlen($data);
          if ($dataLength === 0) {
              throw new \RuntimeException('Can not send an empty package.');
          }
          if ($this->isIpAddress()) {
              $address = $this->peerAddress->getIp();
              $port = $this->peerAddress->getPort();
          } else {
              $address = $this->peerAddress->getSockPath();
              $port = 0;
          }
          $wrote = socket_sendto($this->connectionResource->getResource(), $data, strlen($data), 0, $address, $port);
          if ($wrote === false || $wrote === 0) {
  //            throw new SendException('I don\'t send :(');
              return false;
          } elseif ($wrote < $dataLength) {
              throw new SendException('Could not send the whole package.');
          }
          return true;
      }
docs: @param $data
  
  @return bool
  @throws SendException