private boolean insideGet;

    @Deprecated
    protected void getTransfer(Resource resource, File destination, InputStream input, boolean closeInput, int maxSize)
            throws TransferFailedException {
        addTransfer("getTransfer " + resource.getName());
        super.getTransfer(resource, destination, input, closeInput, maxSize);
    }

wetransfer.svg...

import org.apache.maven.wagon.observers.AbstractTransferListener;

public class TestTransferListener extends AbstractTransferListener {

    private final List<String> transfers = new ArrayList<>();

    public List<String> getTransfers() {
        return transfers;
    }

    public void addTransfer(String name) {
        transfers.add(name);
    }