code: public static SubscriptionRequestRule generateGenericRule() {
      SubscriptionRequestRule rule = new SubscriptionRequestRule();
  
      rule.setUpdateInterval(0l);
  
      rule.setPhysicalLayer(SampleMessage.PHYSICAL_LAYER_ALL);
  
      return rule;
    }
docs: Generates a new {@code SubscriptionRequestRule} with a physical layer
  identifier of {@link SampleMessage#PHYSICAL_LAYER_ALL}, an update interval
  of 0 milliseconds, and no transmitters. This rule will effectively request
  ALL data from an aggregator.
  
  @return the new rule.