pocketmine\Player::switchLevel PHP Method

    protected function switchLevel(Level $targetLevel)
    {
        $oldLevel = $this->level;
        if (parent::switchLevel($targetLevel)) {
            foreach ($this->usedChunks as $index => $d) {
                Level::getXZ($index, $X, $Z);
                $this->unloadChunk($X, $Z, $oldLevel);
            }
            $this->usedChunks = [];
            $pk = new SetTimePacket();
            $pk->time = $this->level->getTime();
            $pk->started = $this->level->stopTime == false;
            $this->dataPacket($pk);
            if ($targetLevel->getDimension() != $oldLevel->getDimension()) {
                $pk = new ChangeDimensionPacket();
                $pk->dimension = $targetLevel->getDimension();
                $pk->x = $this->x;
                $pk->y = $this->y;
                $pk->z = $this->z;
                $this->dataPacket($pk);
                $this->shouldSendStatus = true;
            }
            $targetLevel->getWeather()->sendWeather($this);
            if ($this->spawned) {
                $this->spawnToAll();
            }
        }
    }