No globals

local mt = getmetatable(_G) or {} function mt.__index (t, k)	if k ~= 'arg' then -- perf optimization here and below: do not load Module:TNT unless there is an error error(require('Module:TNT').format('I18n/No globals', 'err-read', tostring(k)), 2) end return nil end function mt.__newindex(t, k, v)	if k ~= 'arg' then error(require('Module:TNT').format('I18n/No globals', 'err-write', tostring(k)), 2) end rawset(t, k, v) end setmetatable(_G, mt)