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In the code below I tried to define a static (class) variable `Display.count'.
It seems to work at first. But doesn't work any more once you rename the class.
What's the correct way to get static variables?


Display = {}
Display.count = 0

function Display:new ()
   local me = {}
   setmetatable(me, self)
   self.__index = self
   Display.count = Display.count + 1
   return me

function Display:getCount ()
   return Display.count

dis1 = Display:new()
dis2 = Display:new()
print(dis1:getCount(), dis2:getCount())

-- now let's rename Display
DDD, Display = Display, nil

dis = DDD:new()