pocketmine\nbt\NBT::setData PHP Метод

    public function setData($data)
    {
        $this->data = $data;
    }

 private static function writeCompoundTag(CompoundTag $tag) : string
 {
     if (self::$cachedParser === null) {
         self::$cachedParser = new NBT(NBT::LITTLE_ENDIAN);
     }
     self::$cachedParser->setData($tag);
     return self::$cachedParser->write();
 }