I like one idea from Monarch for logging handling, so when you have disabled debugging, the log function looks like this:
local function log(...) end
But when you enable debug, by calling monarch.debug(), you change the function to:
function M.debug()
log = print
end
So you basically only then assign any function to log()
This way, anywhere in the module you write:
log("something to print")
You print it only after enabling debug, otherwise it is just a very quick, almost neglectable call to empty function 