code: public com.google.api.Monitoring.MonitoringDestinationOrBuilder getConsumerDestinationsOrBuilder(
        int index) {
      return consumerDestinations_.get(index);
    }
docs: <pre>
  Monitoring configurations for sending metrics to the consumer project.
  There can be multiple consumer destinations. A monitored resouce type may
  appear in multiple monitoring destinations if different aggregations are
  needed for different sets of metrics associated with that monitored
  resource type. A monitored resource and metric pair may only be used once
  in the Monitoring configuration.
  </pre>
  
  <code>repeated .google.api.Monitoring.MonitoringDestination consumer_destinations = 2;</code>