logger.warn("The metadata {} {}{}", metadata, errorType, msg);
        }
    }

    @Override
    public void artifactDescriptorInvalid(RepositoryEvent event) {
        // The exception stack trace is not really interesting here
        // but the message itself may be quite details and span multiple
        // lines with errors in it, so only display it at debug level.

/**
 * The session to install / deploy / resolve artifacts and dependencies.
 *
 * TODO: move the remote repositories in the requests (plugins will need to access this list somehow)
 * TODO: add request trace so that requests can be linked together and through the resolver
 * TODO: add a Request interface holding session + parent request
 *
 * @since 4.0.0
 */
@Experimental
@ThreadSafe
public interface Session {

 */
public interface MessageBuilder extends Appendable {

    /**
     * Append message content in trace style.
     * By default, bold magenta
     *
     * @param message the message to append
     * @return the current builder
     */
    @Nonnull
    default MessageBuilder trace(Object message) {
        return style(".trace:-bold,f:magenta", message);
    }

    /**
     * Append message content in debug style.

            requests.add(new MetadataRequest(metadata, null, REPOSITORY_CONTEXT).setTrace(trace));

            for (RemoteRepository repository : request.getRepositories()) {
                requests.add(new MetadataRequest(metadata, repository, REPOSITORY_CONTEXT).setTrace(trace));
            }
        }

        // initial try, use locally cached metadata

            RequestTrace trace,
            RepositorySystem resolver,
            RemoteRepositoryManager remoteRepositoryManager,
            List<RemoteRepository> repositories,
            ProjectBuildingRequest.RepositoryMerging repositoryMerging,
            ReactorModelPool modelPool,
            Map<String, Object> parentCache) {
        this.session = session;
        this.trace = trace;
        this.resolver = resolver;

            ModelBuilderRequest.ModelBuilderRequestBuilder modelBuildingRequest = ModelBuilderRequest.builder();

            RequestTrace trace = RequestTrace.newChild(null, request).newChild(modelBuildingRequest);

            ModelResolver resolver = new ModelResolverWrapper() {
                @Override

     * creator of the problem, the general expectation is that the hint provides sufficient information to the user to
     * track the problem back to its origin. A concrete example for such a source hint can be the file path or URL from
     * which the settings were read.
     *

        return CacheUtils.pluginEquals(a, b);
    }

    public void register(MavenProject project, Key cacheKey, CacheRecord record) {
        // default cache does not track record usage
    }

PROPERTY_XMLDECL_CONTENT = http://xmlpull.org/v1/doc/properties.html#xmldecl-content; protected static final String PROPERTY_LOCATION = http://xmlpull.org/v1/doc/properties.html#location; protected boolean allStringsInterned; private static final boolean TRACE_SIZING = 0; protected boolean processNamespaces; protected boolean roundtripSupported; protected String location; protected int lineNumber; protected int columnNumber; protected boolean seenRoot; protected boolean reachedEnd; protected int eventType;...

    @Override
    public void flush() {
        cache.clear();
    }

    @Override
    public void register(MavenProject project, Key cacheKey, CacheRecord record) {
        // default cache does not track record usage
    }