pocketmine\level\Position::fromObject PHP Method

    public static function fromObject(Vector3 $pos, Level $level = null)
    {
        return new Position($pos->x, $pos->y, $pos->z, $level);
    }

 /**
  * Really starts the duel after countdown
  */
 public function startDuel()
 {
     Server::getInstance()->getScheduler()->cancelTask($this->countdownTaskHandler->getTaskId());
     $player1 = $this->players[0];
     $player2 = $this->players[1];
     $pos_player1 = Position::fromObject($this->position, $this->position->getLevel());
     $pos_player1->x += self::PLAYER_1_OFFSET_X;
     $pos_player2 = Position::fromObject($this->position, $this->position->getLevel());
     $pos_player2->x += self::PLAYER_2_OFFSET_X;
     $player1->teleport($pos_player1, 90, 0);
     $player2->teleport($pos_player2, -90, 0);
     $this->sparyParticle($player1);
     $this->sparyParticle($player2);
     $player1->setGamemode(0);
     $player2->setGamemode(0);
     // Give kit
     foreach ($this->players as $player) {
         $this->giveKit($player);
     }
     // Fix start time
     $this->startTime = new DateTime('now');
     $player1->sendTip(OneVsOne::getMessage("duel_tip"));
     $player1->sendMessage(OneVsOne::getMessage("duel_start"));
     $player2->sendTip(OneVsOne::getMessage("duel_tip"));
     $player2->sendMessage(OneVsOne::getMessage("duel_start"));
     // Launch the end round task
     $task = new RoundCheckTask(OneVsOne::getInstance());
     $task->arena = $this;
     $this->taskHandler = Server::getInstance()->getScheduler()->scheduleDelayedTask($task, self::ROUND_DURATION * 20);
 }