function __TS__Index(classProto)
    return function(tbl, key)
        local proto = classProto
        while true do
            local val = rawget(proto, key)
            if val ~= nil then
                return val
            end
            local getters = rawget(proto, "____getters")
            if getters then
                local getter
                getter = getters[key]
                if getter then
                    return getter(tbl)
                end
            end
            local base = rawget(
                rawget(proto, "constructor"),
                "____super"
            )
            if not base then
                break
            end
            proto = rawget(base, "prototype")
        end
    end
end