pocketmine\entity\Projectile::initEntity PHP Method

    protected function initEntity()
    {
        parent::initEntity();
        $this->setMaxHealth(1);
        $this->setHealth(1);
        if (isset($this->namedtag->Age)) {
            $this->age = $this->namedtag["Age"];
        }
    }

 public function initEntity()
 {
     parent::initEntity();
     if (isset($this->namedtag->Data)) {
         $this->data = $this->namedtag["Data"];
     }
     // $this->setDataProperty(FallingSand::DATA_BLOCK_INFO, self::DATA_TYPE_INT, $this->getData());
 }