Roblox GetFullName Replacement

local function GetFullName(instance)
    if instance == game then
        return game.Name
    elseif instance.Parent == nil then
        return instance.Name
    else
        local parent = instance
        local fullName = ""

        while true do
            if parent.Parent == game then
                fullName = parent.ClassName .. fullName
                return fullName
            else
                local name = parent.Name

                if name:match("[^%w_]") or tonumber(name:sub(1, 1)) then
                    fullName = ("[%q]"):format(name) .. fullName
                elseif name == "" then
                    fullName = "[\"\"]" .. fullName
                else
                    fullName = (".%s"):format(name) .. fullName
                end
            end

            parent = parent.Parent
        end
    end
end