//
    // p4 inherits from p3
    // p3 inherits from p2
    // p2 inherits from p1
    // p1 inherits from p0
    // p0 inherits from super model
    //
    // or we can show it graphically as:
    //
    // p4 ---> p3 ---> p2 ---> p1 ---> p0 --> super model
    //
    // ----------------------------------------------------------------------

    @Test

    // merged into POM being built. Once the POM builder has this plugin information, versions can be assigned
    // by the POM builder because they will have to be defined in plugin management. Once this is setComplete then it
    // can be passed back so that the default configuration information can be populated.
    //
    // We need to know the specific version so that we can look up the right version of the plugin descriptor

import org.eclipse.aether.resolution.DependencyResult;

/**
 * Assists in resolving the dependencies of a plugin. <strong>Warning:</strong> This is an internal utility interface
 * that is only public for technical reasons, it is not part of the public API. In particular, this interface can be
 * changed or deleted without prior notice.
 *
 * @since 3.0
 */
public interface PluginDependenciesResolver {

    /**

    ArtifactScopeEnum scope;
    int depth = -1;
    int pomOrder = -1;
    boolean resolved = true;
    String artifactUri;

    /**
     * capturing where this link came from
     * and where it is linked to.
     *
     *   In the first implementation only source used for explanatory function
     */
    MetadataGraphVertex source;

    MetadataGraphVertex target;

        // topological order of the projects, and therefore can potentially change the build order.
        //
        // Note that participants may affect the topological order of the projects but it is
        // not expected that a participant will add or remove projects from the session.
        //

        graphResult = buildGraph(session);

        if (graphResult.hasErrors()) {

            Parent parent = project.getModel().getDelegate().getParent();

            if (parent != null) {
                // Parent is added as an edge, but must not cause a cycle - so we remove any other edges it has
                // in conflict
                addEdge(
                        projectMap,
                        vertexMap,
                        null,
                        projectVertex,

            // -1
            //  or QUALIFIERS.size and then resort to lexical ordering. Most comparisons are decided by the first
            // character,
            // so this is still fast. If more characters are needed then it requires a lexical sort anyway.
            return i == -1 ? (QUALIFIERS.size() + "-" + qualifier) : String.valueOf(i);
        }

        @Override
        public int compareTo(Item item) {

        return versionRangeViolations != null;
    }

    /**
     * TODO this needs to accept a {@link OverConstrainedVersionException} as returned by
     *       {@link #getVersionRangeViolation(int)} but it's not used like that in
     *       DefaultLegacyArtifactCollector
     *
     * @param e an exception
     * @return {@code this}
     */
    public ArtifactResolutionResult addVersionRangeViolation(Exception e) {

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Manages the class realms used by Maven. <strong>Warning:</strong> This is an internal utility class that is only
 * public for technical reasons, it is not part of the public API. In particular, this class can be changed or deleted
 * without prior notice.
 *
 */
@Named
@Singleton
public class DefaultClassRealmManager implements ClassRealmManager {

    // Backward compat

    /**
     * Returns the plugin context for given key ({@link PluginDescriptor#getPluginLookupKey()} and
     * {@link MavenProject}, never returns {@code null} as if context not present, creates it.
     *
     * <strong>Implementation note:</strong> while this method return type is {@link Map}, the returned map instance
     * implements {@link ConcurrentMap} as well.
     *
     */