How to add the item to your inventory?

How to add the item to your inventory?

$player->getInventory()->addItem($item);

Ways to get $item:

• $item = Item::get($id, $damage, $count);
• $item = new ClassName; (e.g. new IronSword, ref. https://github.com/PocketMine/PocketMine-MP/tree/master/src/pocketmine/item