function GetNumSetItemsEquipped(setID)
    -- From WeakAuras.GetNumSetItemsEquipped
    -- https://github.com/WeakAuras/WeakAuras2/blob/master/WeakAuras/Prototypes.lua#L969
    if not setID or not type(setID) == "number" then return end
    local equipped = 0
    local setName = GetItemSetInfo(setID)
    for i = 1, 18 do
        local item = GetInventoryItemID("player", i)
        if item and select(16, GetItemInfo(item)) == setID then
            equipped = equipped + 1
        end
    end
    return equipped, 18, setName
end