public void transferInitiated(TransferEvent transferEvent) {
        listener.transferInitiated(wrap(transferEvent));
    }

    @Override
    public void transferProgress(TransferEvent transferEvent, byte[] buffer, int length) {
        Long transferred;
        synchronized (transfers) {
            transferred = transfers.get(transferEvent.getResource());
            if (transferred == null) {

    void setShowChecksumEvents(boolean showChecksumEvents);

    void transferInitiated(ArtifactTransferEvent transferEvent);

    void transferStarted(ArtifactTransferEvent transferEvent);

    void transferProgress(ArtifactTransferEvent transferEvent);

    void transferCompleted(ArtifactTransferEvent transferEvent);

        class TransferListener extends AbstractTransferListener {
            List<TransferEvent> events = new ArrayList<>();

            @Override
            public void transferInitiated(TransferEvent transferEvent) {
                events.add(transferEvent);
            }
        }

        TransferListener listener = new TransferListener();

        return exception;
    }

    /**
     * Returns the request type.
     *
     * @return Returns the request type. The Request type is one of
     *         <code>TransferEvent.REQUEST_GET</code> or <code>TransferEvent.REQUEST_PUT</code>
     */
    public int getRequestType() {
        return requestType;
    }

    /**
     * Sets the request type
     *