If there is an Botania's item in the slot provided by the Baubles mod, where should I get the item information from the api

Version Information
Minecraft 1.12.2
Forge version: 14.23.5.2847

Using the baubles API
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public static IInventory getBaubles(EntityPlayer player)
{
IBaublesItemHandler handler = player.getCapability(BaublesCapabilities.CAPABILITY_BAUBLES, null);
handler.setPlayer(player);
return new BaublesInventoryWrapper(handler, player);
}

Is this?