code: public static String formatRulePath(String topicPath, String subscriptionName, String ruleName) {
          return String.join(pathDelimiter,
                  topicPath,
                  subscriptionsSubPath,
                  subscriptionName,
                  rulesSubPath,
                  ruleName);
      }
docs: Formats the rule path, based on the topic path, subscription name and the rule name.
  @param topicPath - The name of the topic, including slashes.
  @param subscriptionName - The name of the subscription.
  @param ruleName - The name of the rule.
  @return The path of the rule