function __TS__ClassIndex(classTable, key)
    while true do
        local getters = rawget(classTable, "____getters")
        if getters then
            local getter
            getter = getters[key]
            if getter then
                return getter(classTable)
            end
        end
        classTable = rawget(classTable, "____super")
        if not classTable then
            break
        end
        local val = rawget(classTable, key)
        if val ~= nil then
            return val
        end
    end
end