code: public void setEventTopics(java.util.Collection<EventTopic> eventTopics) {
          if (eventTopics == null) {
              this.eventTopics = null;
              return;
          }
  
          this.eventTopics = new com.amazonaws.internal.SdkInternalList<EventTopic>(eventTopics);
      }
docs: <p>
  A list of SNS topic names that receive status messages from the specified Directory ID.
  </p>
  
  @param eventTopics
  A list of SNS topic names that receive status messages from the specified Directory ID.