docs: protected IncomingFileTransfer createIncomingFileTransfer(
              FileTransferRequest request) {
          if (request == null) {
              throw new NullPointerException("ReceiveRequest cannot be null");
          }
  
          IncomingFileTransfer transfer = new IncomingFileTransfer(request,
                  fileTransferNegotiator);
          transfer.setFileInfo(request.getFileName(), request.getFileSize());
  
          return transfer;
      }