World of Warcraft addon-contents that will show needed trait IDs on tooltips for generic talent trees

traitIDs.lua

-- Trait trees

do
    local lastTree, lastConfig
    EventRegistry:RegisterCallback("GenericTraitFrame.SetTreeID", function(_, treeid, configid)
        lastTree = treeid
        lastConfig = configid
    end)
    EventRegistry:RegisterCallback("TalentDisplay.TooltipCreated", function(_, button, tooltip)
        if lastTree then
            tooltip:AddDoubleLine("treeID", lastTree)
        end
        if lastConfig then
            tooltip:AddDoubleLine("configID", lastConfig)
        end
        if button:GetNodeID() then
            tooltip:AddDoubleLine("nodeID", button:GetNodeID())
        end
        if button:GetEntryID() then
            tooltip:AddDoubleLine("entryID", button:GetEntryID())
        end
        if button:GetSpellID() then
            tooltip:AddDoubleLine("spellID", button:GetSpellID())
        end
        tooltip:Show()
    end)
end