# Match `url` property in object to a class name
	fun url_heuristic(raw: Map[String, nullable Object]): nullable String do
		if not raw.has_key("url") then return null

		var url = raw["url"].as(String)
		for re, class_name in url_patterns do
			if url.has(re) then return class_name
		end
		return null
	end