code: public DescribeEventTopicsResult withEventTopics(EventTopic... eventTopics) {
          if (this.eventTopics == null) {
              setEventTopics(new com.amazonaws.internal.SdkInternalList<EventTopic>(eventTopics.length));
          }
          for (EventTopic ele : eventTopics) {
              this.eventTopics.add(ele);
          }
          return this;
      }
docs: <p>
  A list of SNS topic names that receive status messages from the specified Directory ID.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setEventTopics(java.util.Collection)} or {@link #withEventTopics(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param eventTopics
  A list of SNS topic names that receive status messages from the specified Directory ID.
  @return Returns a reference to this object so that method calls can be chained together.