it.keySet() as List == ["specialItem"]
            it.size() == 1
            !it.isEmpty()
            it.get("item") == null
            this.specialItemClass.isInstance it.get("specialItem")
        }

        with (map.withType(specialItemClass).withType(itemClass)) {
            it*.name == ["specialItem"]
            it.keySet() as List == ["specialItem"]
            it.size() == 1