classRealm = classRealmManager.createProjectRealm(newTestModel(), newTestArtifactList());
        }

        assertEquals(classRealmManager.getMavenApiRealm(), classRealm.getParentClassLoader());
        assertEquals("project>modelGroup1:modelArtifact1:modelVersion1", classRealm.getId());
        assertEquals(1, classRealm.getURLs().length);
        assertTrue(

    /**
     * CacheKey
     */
    protected static class CacheKey implements Key {

        private final List<? extends ClassRealm> extensionRealms;

        private final int hashCode;

        public CacheKey(List<? extends ClassRealm> extensionRealms) {
            this.extensionRealms =

        }

        ClassRealm classRealm = newRealm(baseRealmId);

        if (parent != null) {
            classRealm.setParentClassLoader(parent);
        }

        callDelegates(classRealm, type, parent, parentImports, foreignImports, constituents);

        wireRealm(classRealm, parentImports, foreignImports);

        populateRealm(classRealm, constituents);

        return classRealm;

     * CacheRecord
     */
    class CacheRecord {
        public ClassRealm getRealm() {
            return realm;
        }

        public List<Artifact> getArtifacts() {
            return artifacts;
        }

        private final ClassRealm realm;

        private final List<Artifact> artifacts;

        public CacheRecord(ClassRealm realm, List<Artifact> artifacts) {
            this.realm = realm;

            }

            return new ProjectRealmCache.CacheRecord(null, null);
        }

        List<ClassRealm> extensionRealms = new ArrayList<>();

        Map<ClassRealm, List<String>> exportedPackages = new HashMap<>();

        Map<ClassRealm, List<String>> exportedArtifacts = new HashMap<>();

        List<Artifact> publicArtifacts = new ArrayList<>();

        return jars;
    }

    protected ClassRealm setupContainerRealm(
            Logger logger,
            ClassWorld classWorld,
            ClassRealm coreRealm,
            List<Path> extClassPath,
            List<CoreExtensionEntry> extensions)
            throws Exception {
        if (!extClassPath.isEmpty() || !extensions.isEmpty()) {
            ClassRealm extRealm = classWorld.newRealm("maven.ext", null);

                return desc;
            }
        }
        return null;
    }

    public void setClassRealm(ClassRealm classRealm) {
        this.classRealm = classRealm;
    }

    public ClassRealm getClassRealm() {
        return classRealm;
    }

    public void setIntroducedDependencyArtifacts(Set<Artifact> introducedDependencyArtifacts) {

import org.codehaus.plexus.classworlds.realm.ClassRealm;

/**
 * Provides information about artifacts (identified by groupId:artifactId string key) and classpath elements exported by
 * Maven core itself or a Maven core extension.
 *
 * @since 3.3.0
 */
public class CoreExtensionEntry {
    private final ClassRealm realm;

    private final Set<String> artifacts;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.project.ExtensionDescriptor;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.classworlds.realm.ClassRealm;
import org.codehaus.plexus.classworlds.realm.NoSuchRealmException;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.Disposable;

/**

import org.apache.maven.plugin.MojoExecution;
import org.apache.maven.plugin.descriptor.MojoDescriptor;
import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.codehaus.plexus.classworlds.realm.ClassRealm;
import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.repository.RemoteRepository;

/**
 */
public class BuildPluginManagerStub implements BuildPluginManager {

    @Override