barrack = require('barrack')

-- Barrack is disabled by default. barrack.check is a blank function unless enabled.
-- This is to remove any performance hit in production, as barrack is mainly meant for debugging.
-- You can disable barrack with barrack.disable().
barrack.enable()

function createInstance(x, y, name, info)
	barrack.check(	{  x,        y,        name,     info   }, 
					{ 'number', 'number', 'string', 'table' })

	-- Continue writing the rest of your function as you normally would.
	-- Barrack will raise an error if any of the arguments do not match the required type.
end