*/
    @Nonnull
    Optional<Source> locate(@Nonnull Path dir);

    /**
     * Parse the model obtained previously by a previous call to {@link #locate(Path)}.
     *
     * @param source the source to parse, never {@code null}
     * @param options possible parsing options, may be {@code null}

         * processes one artifact at a time and hence cannot associate the artifacts from the same project to use the
         * same timestamp+buildno for the snapshot versions. Allowing the caller to pass in metadata from a previous
         * deployment allows to re-establish the association between the artifacts of the same project.
         */
        for (Metadata metadata : request.getMetadata()) {

         * processes one artifact at a time and hence cannot associate the artifacts from the same project to use the
         * same version index. Allowing the caller to pass in metadata from a previous deployment allows to re-establish
         * the association between the artifacts of the same project.
         */
        for (Iterator<? extends Metadata> it = metadatas.iterator(); it.hasNext(); ) {

        if (previousNodes != null) {
            for (ResolutionNode previous : previousNodes) {
                try {
                    if (previous.isActive()) {
                        // Version mediation
                        VersionRange previousRange = previous.getArtifact().getVersionRange();
                        VersionRange currentRange = node.getArtifact().getVersionRange();

            throws RepositoryMetadataDeploymentException {
        File file;
        if (metadata instanceof RepositoryMetadata) {
            getLogger().info("Retrieving previous metadata from " + deploymentRepository.getId());
            try {
                file = getArtifactMetadataFromDeploymentRepository(metadata, localRepository, deploymentRepository);

                snapshot.setBuildNumber(buildNumber + 1);
            } catch (RepositoryMetadataResolutionException e) {
                throw new ArtifactDeploymentException(
                        "Error retrieving previous build number for artifact '" + artifact.getDependencyConflictId()
                                + "': " + e.getMessage(),
                        e);
            }

     */
    void add(Problem.Severity severity, String message, int line, int column, Exception cause);

    /**
     * The next messages will be bound to this source. When calling this method again, previous messages keep
     * their source, but the next messages will use the new source.
     *
     * @param source a source
     */
    void setSource(String source);

    /**
     *

     */
    @Deprecated
    List<String> getExcludedProjects();

    /**
     * Sets whether the build should be resumed from the data in the resume.properties file.
     * @param resume Whether or not to resume a previous build.
     * @return This request, never {@code null}.
     */
    MavenExecutionRequest setResume(boolean resume);

    /**

                        .getPath()
                        .listIterator(collectStepTrace.getPath().size());
                while (iter.hasPrevious()) {
                    DependencyNode curr = iter.previous();
                    indent += "  ";
                    trackingData.add(indent + curr + " (" + collectStepTrace.getContext() + ")");
                }
            }
        }

         * processes one artifact at a time and hence cannot associate the artifacts from the same project to use the
         * same version index. Allowing the caller to pass in metadata from a previous deployment allows to re-establish
         * the association between the artifacts of the same project.
         */
        for (Iterator<? extends Metadata> it = metadatas.iterator(); it.hasNext(); ) {