Solved How to display items on inventory?

Hi. I want to display item on inventory.
How to write this code? Please tell me.
Thank you for reading my thread, and answering.

https://github.com/PocketMine/Pocke.../pocketmine/inventory/PlayerInventory.php#L61
The 9 slots there are called hotbar. The inventory refers to the whole 36 slots of inventory.

Thank you. I'll use it.