code: public TransferUsersPlaybackRequest.Builder transferUsersPlayback(JsonArray device_ids) {
      return new TransferUsersPlaybackRequest.Builder(accessToken)
              .setDefaults(httpManager, scheme, host, port)
              .device_ids(device_ids);
    }
docs: Transfer playback to a new device and determine if it should start playing.
  
  @param device_ids A JSON array containing the ID of the device on which playback should be started/transferred.
  <br><b>Note:</b> Although an array is accepted, only a single device_id is currently supported.
  @return A {@link TransferUsersPlaybackRequest.Builder}.