# Build a new `MModule` from a `node`.
	#
	# REQUIRE `node.labels.has("MModule")`
	private fun to_mmodule(model: Model, node: NeoNode): MModule do
		var m = mentities.get_or_null(node.id.as(Int))
		if m isa MModule then return m

		assert node.labels.has("MModule")
		var ins = node.in_nodes("DECLARES")
		var mgroup: nullable MGroup = null
		if not ins.is_empty then
			mgroup = to_mgroup(model, ins.first)
		end
		var name = node["name"].to_s
		var location = to_location(node["location"].to_s)
		var mmodule = new MModule(model, mgroup, name, location)
		mentities[node.id.as(Int)] = mmodule
		set_doc(node, mmodule)
		var imported_mmodules = new Array[MModule]
		for smod in node.out_nodes("IMPORTS") do
			imported_mmodules.add to_mmodule(model, smod)
		end
		mmodule.set_imported_mmodules(imported_mmodules)
		return mmodule
	end