API GetContainerItemID

Returns the item id of the item in a particular container slot. itemId = GetContainerItemID(bag, slot);

Arguments

 * bag : Number (BagId) - Index of the bag to query.
 * slot : Number - Index of the slot within the bag to query; ascending from 1.

Returns

 * itemId : Number - item ID of the item held in the container slot, nil if there is no item in the container slot.