return injector.getInstance(Session.class);
    }

    static class DefaultSession extends AbstractSession {

        private final Map<String, String> systemProperties;
        private Instant startTime = Instant.now();

        DefaultSession(RepositorySystemSession session, RepositorySystem repositorySystem, Lookup lookup) {
            this(session, repositorySystem, Collections.emptyList(), null, lookup);
        }

            valueSource.clearFeedback();
        }
    }

    static class BuildTimestampValueSource extends AbstractValueSource {
        private final Instant startTime;
        private final Map<String, String> properties;

        BuildTimestampValueSource(Instant startTime, Map<String, String> properties) {
            super(false);
            this.startTime = startTime;
            this.properties = properties;
        }

    public int getDegreeOfConcurrency() {
        return getMavenSession().getRequest().getDegreeOfConcurrency();
    }

    @Nonnull
    @Override
    public Instant getStartTime() {
        return getMavenSession().getRequest().getStartTime().toInstant();
    }

    @Override
    public Path getRootDirectory() {
        return getMavenSession().getRequest().getRootDirectory();
    }

    @Override

     *             to {@link #MavenBuildTimestamp(Instant, String)} instead.
     */
    @Deprecated
    public MavenBuildTimestamp(Instant time, Properties properties) {
        this(time, properties != null ? properties.getProperty(BUILD_TIMESTAMP_FORMAT_PROPERTY) : null);
    }

    public MavenBuildTimestamp(Instant time, String timestampFormat) {

    /**
     * Shortcut for {@code getService(ArtifactInstaller.class).install(...)}.
     *
     * @param artifacts the artifacts to install
     * @throws org.apache.maven.api.services.ArtifactInstallerException if the artifacts installation failed
     *
     * @see org.apache.maven.api.services.ArtifactInstaller#install(Session, Collection)
     */
    void installArtifacts(@Nonnull Artifact... artifacts);

            return determineBuildOutputDirectoryForArtifact(project, artifact);
        }

        // The fall-through indicates that the artifact cannot be found;
        // for instance if package produced nothing or classifier problems.
        return null;
    }

    private File determineBuildOutputDirectoryForArtifact(final MavenProject project, final Artifact artifact) {

 * or module hierarchy, but not module source hierarchy. The latter is excluded because this class
 * is for path elements of compiled codes.
 */
class PathModularization {
    /**
     * A unique constant for all non-modular dependencies.
     */
    public static final PathModularization NONE = new PathModularization();

    /**

        "package", "org.apache.maven.plugins:maven-jar-plugin:" + JAR_PLUGIN_VERSION + ":jar",
        "install", "org.apache.maven.plugins:maven-install-plugin:" + INSTALL_PLUGIN_VERSION + ":install",
        "deploy", "org.apache.maven.plugins:maven-deploy-plugin:" + DEPLOY_PLUGIN_VERSION + ":deploy"
    };
    // END SNIPPET: jar

    @Inject

            plugins.add(newPlugin("maven-surefire-plugin", "test"));
            plugins.add(newPlugin("maven-jar-plugin", "jar"));
            plugins.add(newPlugin("maven-install-plugin", "install"));
            plugins.add(newPlugin("maven-deploy-plugin", "deploy"));
        } else {
            plugins = Collections.emptySet();
        }

        return plugins;
    }

 * explicitly order implementations using Sisu priorities.
 *
 * @since 4.0.0
 */
public interface MavenArtifactRelocationSource {
    /**
     * Returns {@link Artifact} instance where to relocate to, or {@code null}.
     *
     * @param session The session, never {@code null}.
     * @param result The artifact descriptor result, never {@code null}.