again problem with hotbar

Hey guys, i am adding items in player inventory by : $player->getInventory()->addItem(Item::get($id));
I want to add item that won't be shown in players hotbar but it will be shown into inventory.
Thank you for attention. I need your help, please^-^

Didn't I help you already? You said it worked? What changed between now and then?

Flabe, try to do something with
$player->getInventory()->setHotbarSlotIndex(...)

He does not want it in the hotbar, please double check the original message. But it would be $player->getInventory()->setSlot(...);

as "Minecraft Gamepedia: Inventory" says that first PlayerInventory::getHotbarSize() slots are slots for hotbar.