code: public void setDestinations(java.util.Collection<GameSessionQueueDestination> destinations) {
          if (destinations == null) {
              this.destinations = null;
              return;
          }
  
          this.destinations = new java.util.ArrayList<GameSessionQueueDestination>(destinations);
      }
docs: <p>
  List of fleets that can be used to fulfill game session placement requests in the queue. Fleets are identified by
  either a fleet ARN or a fleet alias ARN. Destinations are listed in default preference order.
  </p>
  
  @param destinations
  List of fleets that can be used to fulfill game session placement requests in the queue. Fleets are
  identified by either a fleet ARN or a fleet alias ARN. Destinations are listed in default preference
  order.