pocketmine\item\Item::getEnchantment PHP Method

    public function getEnchantment(int $id)
    {
        if (!$this->hasEnchantments()) {
            return null;
        }
        foreach ($this->getNamedTag()->ench as $entry) {
            if ($entry["id"] === $id) {
                $e = Enchantment::getEnchantment($entry["id"]);
                $e->setLevel($entry["lvl"]);
                return $e;
            }
        }
        return null;
    }