code: public java.util.List<? extends com.google.api.Billing.BillingDestinationOrBuilder> 
        getConsumerDestinationsOrBuilderList() {
      return consumerDestinations_;
    }
docs: <pre>
  Billing configurations for sending metrics to the consumer project.
  There can be multiple consumer destinations per service, each one must have
  a different monitored resource type. A metric can be used in at most
  one consumer destination.
  </pre>
  
  <code>repeated .google.api.Billing.BillingDestination consumer_destinations = 8;</code>