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

		assert node.labels.has("MClass")
		var mmodule = to_mmodule(model, node.in_nodes("INTRODUCES").first)
		var name = node["name"].to_s
		var location = to_location(node["location"].to_s)
		var kind = to_kind(node["kind"].to_s)
		var visibility = to_visibility(node["visibility"].to_s)
		var parameter_names = new Array[String]
		if node.has_key("parameter_names") then
			for e in node["parameter_names"].as(JsonArray) do
				parameter_names.add e.to_s
			end
		end
		var mclass = new MClass(mmodule, name, location, parameter_names, kind, visibility)
		mentities[node.id.as(Int)] = mclass
		set_doc(node, mclass)
		return mclass
	end