__mode implemented?

Hey guys,

Is the metafield __mode implemented?
collectgarbage() isn't implemented and
I am too lazy for a long time test.

I would test it as follows

local t = {
  no = {}
}
setmetatable(t, {__mode = 'v'})
while t.no do
  sleep(1)
end
print('works')

but I don't do it, so I ask it.

Sewbacca

It's not implemented, along with most other gc-related Lua features.