Optional<ProducedArtifact> mainArtifact = project.getMainArtifact();
        return mainArtifact.flatMap(artifactManager::getPath);
    }

    @Nonnull
    @Override
    public Collection<ProducedArtifact> getAttachedArtifacts(@Nonnull Project project) {
        requireNonNull(project, "project" + " cannot be null");
        Collection<ProducedArtifact> attached =

     *
     * @see #getPackaging()
     * @see org.apache.maven.api.services.ArtifactManager#getPath(Artifact)
     */
    @Nonnull
    default Optional<ProducedArtifact> getMainArtifact() {
        List<ProducedArtifact> artifacts = getArtifacts();
        return artifacts.size() == 2 ? Optional.of(artifacts.get(1)) : Optional.empty();
    }

    /**

    /**
     * Shortcut for {@code getService(ArtifactManager.class).setPath(...)}.
     *
     * @param artifact the artifact for which to associate a path
     * @param path path to associate to the given artifact
     *
     * @see org.apache.maven.api.services.ArtifactManager#setPath(ProducedArtifact, Path)
     */

import java.util.Objects;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Stream;

import org.apache.maven.api.Artifact;
import org.apache.maven.api.ProducedArtifact;
import org.apache.maven.api.Service;
import org.apache.maven.api.annotations.Nonnull;
import org.apache.maven.api.di.SessionScoped;
import org.apache.maven.api.services.ArtifactManager;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.maven.SimpleLookup;
import org.apache.maven.api.ProducedArtifact;
import org.apache.maven.api.services.ArtifactManager;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.metadata.SwitchableMetadataSource;

 * The {@link org.apache.maven.api.DownloadedArtifact} sub-interface is used when
 * an artifact has been resolved and the {@link org.apache.maven.api.ProducedArtifact} sub-interface when
 * an artifact is being produced by a project.</p>
 *
 * <p>{@link org.apache.maven.api.DependencyCoordinates} instances represent a dependency element in a POM.