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

		assert node.labels.has("MParameter")
		var name = node["name"].to_s
		var mtype = to_mtype(model, node.out_nodes("TYPE").first)
		var is_vararg = node["is_vararg"].as(Bool)
		var mparameter = new MParameter(name, mtype, is_vararg)
		mentities[node.id.as(Int)] = mparameter
		return mparameter
	end