code: public static void runExample(
        AdManagerServices adManagerServices,
        AdManagerSession session,
        long masterCreativeId,
        long companionCreativeId)
        throws RemoteException {
      // Get the CreativeSetService.
      CreativeSetServiceInterface creativeSetService =
          adManagerServices.get(session, CreativeSetServiceInterface.class);
  
      CreativeSet creativeSet = new CreativeSet();
      creativeSet.setName("Creative set #" + new Random().nextInt(Integer.MAX_VALUE));
      creativeSet.setMasterCreativeId(masterCreativeId);
      creativeSet.setCompanionCreativeIds(new long[] {companionCreativeId});
  
      // Create the creative set on the server.
      CreativeSet createdCreativeSet = creativeSetService.createCreativeSet(creativeSet);
  
      System.out.printf(
          "A creative set with ID %d, master creative ID %d, "
              + "and companion creative IDs [%s] was created.%n",
          createdCreativeSet.getId(),
          createdCreativeSet.getMasterCreativeId(),
          Longs.join(",", createdCreativeSet.getCompanionCreativeIds()));
    }
docs: Runs the example.
  
  @param adManagerServices the services factory.
  @param session the session.
  @param masterCreativeId the ID of the master creative in the creative set.
  @param companionCreativeId the ID of the companion creative in the creative set.
  @throws ApiException if the API request failed with one or more service errors.
  @throws RemoteException if the API request failed due to other errors.