List<Artifact> artifacts) {
        List<ClassRealmConstituent> constituents = new ArrayList<>(artifacts == null ? 0 : artifacts.size());

        if (artifacts != null && !artifacts.isEmpty()) {
            boolean v4api = foreignImports != null && foreignImports.containsValue(maven4ApiRealm);
            for (Artifact artifact : artifacts) {

    public void addArtifact(Artifact artifact) {
        if (artifacts == null) {
            artifacts = new LinkedHashSet<>();
        }

        artifacts.add(artifact);
    }

    public Set<Artifact> getArtifacts() {
        if (artifacts == null) {
            artifacts = new LinkedHashSet<>();
        }

        return artifacts;
    }

    public void setArtifacts(Set<Artifact> artifacts) {

        attachArtifact(project, artifact, path);
    }

    /**
     * Attaches a produced artifact to the project at the specified path. This is the base method
     * that the other attachArtifact methods delegate to.
     *
     * @param project the project to attach the artifact to
     * @param artifact the produced artifact to attach
     * @param path the path to the artifact file
     */

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.factory.ArtifactFactory;
import org.apache.maven.artifact.metadata.ArtifactMetadataRetrievalException;
import org.apache.maven.artifact.metadata.ArtifactMetadataSource;
import org.apache.maven.artifact.metadata.ResolutionGroup;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.LegacyLocalRepositoryManager;

     *
     * @param artifact the artifact for which to get a local path
     * @return local path associated to the given artifact, or {@code null} if none
     *
     * @see org.apache.maven.api.services.LocalRepositoryManager#getPathForLocalArtifact(Session, LocalRepository, Artifact)
     */
    Path getPathForLocalArtifact(@Nonnull Artifact artifact);

    /**
     * Gets the relative path for an artifact cached from a remote repository.

            ComponentUtil.getThemeHelper().install(artifact);
            break;
        default:
            install(artifact);
            break;
        }
    }

    /**
     * Installs an artifact by downloading it from its URL.
     *
     * @param artifact the artifact to install
     * @throws PluginException if installation fails
     */
    protected void install(final Artifact artifact) {

    public class CacheRecord {
        private Artifact pomArtifact;
        private Artifact relocatedArtifact;
        private List<Artifact> artifacts;
        private Map<String, Artifact> managedVersions;
        private List<ArtifactRepository> remoteRepositories;

        private long length;
        private long timestamp;

        CacheRecord(
                Artifact pomArtifact,

        private final Set<String> keys = new HashSet<>();

        ReactorDependencyFilter(Collection<Artifact> artifacts) {
            for (Artifact artifact : artifacts) {
                String key = ArtifactUtils.key(artifact);
                keys.add(key);
            }
        }

        @Override

    }

    /**
     * Gets the artifacts that make up the plugin's class realm, excluding artifacts shadowed by the Maven core realm
     * like {@code maven-project}.
     *
     * @return The plugin artifacts, never {@code null}.
     */
    public List<Artifact> getArtifacts() {
        return artifacts;
    }

    public void setArtifacts(List<Artifact> artifacts) {
        this.artifacts = artifacts;

        Artifact artifact = new Artifact("test", "1.0.0");
        assertEquals("test", artifact.getName());
        assertEquals("1.0.0", artifact.getVersion());
        assertNull(artifact.getUrl());
        assertEquals("test-1.0.0.jar", artifact.getFileName());
    }

    @Test
    public void test_Artifact_toString() {
        Artifact artifact = new Artifact("test", "1.0.0");