local finalizers = setmetatable({}, {__mode = "k"})

function utilities.SetGCCallback(t, func)
    local ud = newproxy(true)
    debug.getmetatable(ud).__gc = function () return func(t) end

    finalizers[t] = ud

    return t
end

local time = glfw.GetTime()

local LOL = {}
collectgarbage("collect")
collectgarbage("collect")
collectgarbage("collect")
collectgarbage("collect")
collectgarbage("collect")
collectgarbage("collect")
utilities.SetGCCallback(LOL, function() print("LOL") print(glfw.GetTime()-time) end)