private String getMapKey(String name) {
        if (name.contains("{")) {
            return removeQuotes(name.substring(name.indexOf("{") + 1, name.indexOf("}")));
        } else {
            return "";
        }
    }
Deserializes a config payload to slime

@param lines a list with config payload strings
@return an instance of the config class
config/src/main/java/com/yahoo/config/subscription/CfgConfigPayloadBuilder.java