*/
    public static ArtifactScopeEnum checkScope(ArtifactScopeEnum scope) {
        return scope == null ? DEFAULT_SCOPE : scope;
    }

    /**
     *
     * @return unsafe String representation of this scope.
     */
    public String getScope() {
        if (id == 1) {
            return Artifact.SCOPE_COMPILE;
        } else if (id == 2) {
            return Artifact.SCOPE_TEST;

     * <url>scp://host/snapshot-path</url>
     * </snapshotRepository>
     * </distributionManagement>
     * ]]></origin>
     * <usage><![CDATA[
     * The repositories onto which artifacts should be deployed.
     * One is for releases, the other for snapshots.
     * ]]></usage>
     * </expression>
     * <expressions>
     *
     * @throws IOException
     * @throws XmlPullParserException
     */

                                + "plugin(s) that have goals not marked as thread-safe to support parallel execution.",
                        "While this /may/ work fine, please look for plugin updates and/or "
                                + "request plugins be made thread-safe.",
                        "If reporting an issue, report it against the plugin in question, not against Apache Maven.")) {

    CacheRecord get(Key key);

    CacheRecord put(Key key, ClassRealm projectRealm, DependencyFilter extensionArtifactFilter);

    void flush();

    /**
     * Registers the specified cache record for usage with the given project. Integrators can use the information
     * collected from this method in combination with a custom cache implementation to dispose unused records from the
     * cache.
     *

         * remotely resolved snapshot artifact gets passed into pathOf(). So producing a proper local artifact path
         * using DefaultRepositoryLayout requires us to enforce usage of the artifact's base version. This
         * transformation however contradicts the other use case of precisely obeying the repository's layout. The below

 * abused as a cache (i.e. for storing values that can be re-calculated) to avoid memory exhaustion.
 * <p>
 * <strong>Note:</strong> Actual implementations must be thread-safe.
 *
 * @see Session#getData()
 * @since 4.0.0
 */
@Experimental
@ThreadSafe
@Provider
public interface SessionData {

    /**
     * Associates the specified session data with the given key.
     *

    }

    @Override
    public File alignToBaseDirectory(File file) {
        // TODO Copied from the DefaultInterpolator. We likely want to resurrect the PathTranslator or at least a
        // similar component for re-usage
        if (file != null) {
            if (file.isAbsolute()) {
                // path was already absolute, just normalize file separator and we're done
            } else if (file.getPath().startsWith(File.separator)) {

            Maven required to use the resulting plugin.<br>
            In Maven 2, this was also specifying the minimum version of Maven required to build a
            project, but this usage is <b>deprecated</b> in Maven 3 and not checked any more: use
            the <a href="https://maven.apache.org/enforcer/enforcer-rules/requireMavenVersion.html">Maven Enforcer Plugin's

    // ===================================================================================================
    /**
     * Helper class to traverse graph. Required to make the containing method thread-safe
     * and yet use class level data to lessen stack usage in recursion
     */
    private class ClasspathGraphVisitor {
        MetadataGraph graph;

        ClasspathContainer cpc;

        List<MetadataGraphVertex> visited;

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