What does "function placement.new()" do?

[Theothoras (Nairobi)]

Im not sure what the .new does? This is a module script and i’ve never seen this before because im new to scripting. Can someone please explain?

local placement = {}

--Constructor Variables
local GRID_SIZE
local ITEM_LOCATION
local ROTATE_KEY
local TERMINATE_KEY

--Constructor function
function placement.new(g, objs, r, t)
	local data = {}
	local metaData = setmetatable(data, placement)
	
	GRID_SIZE = g
	ITEM_LOCATION = objs
	ROTATE_KEY = r
	TERMINATE_KEY = t
	
	data.grid = GRID_SIZE
	data.itemlocation = ITEM_LOCATION
	data.rotatekey = ROTATE_KEY
	data.terminatekey = TERMINATE_KEY
	
	return data
end

return placement

[yoshicoolTV (coolyoshi)]

.new (you can use colons too for self) is just the name of the function and placement is there because it has to get added to the table