}
            }
        }
        return version;
    }

    public static String versionlessKey(Artifact artifact) {
        return versionlessKey(artifact.getGroupId(), artifact.getArtifactId());
    }

    public static String versionlessKey(String groupId, String artifactId) {
        notBlank(groupId, "groupId can neither be null, empty nor blank");

        return result;
    }

    private static boolean artifactEquals(Artifact a1, Artifact a2) {
        if (a1 == a2) {
            return true;
        }

        return Objects.equals(a1.getGroupId(), a2.getGroupId())
                && Objects.equals(a1.getArtifactId(), a2.getArtifactId())
                && Objects.equals(a1.getType(), a2.getType())
                && Objects.equals(a1.getVersion(), a2.getVersion())

    }

    protected static Metadata createMetadata(Artifact artifact, Versioning versioning) {
        Metadata metadata = new Metadata();
        metadata.setGroupId(artifact.getGroupId());
        metadata.setArtifactId(artifact.getArtifactId());
        metadata.setVersion(artifact.getVersion());
        metadata.setVersioning(versioning);
        return metadata;
    }

import static java.util.Objects.requireNonNull;

/**
 *
 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface ArtifactFactoryRequest extends Request<Session> {

    String getGroupId();

    String getArtifactId();

    String getVersion();

    String getClassifier();

    String getExtension();

    String getType();

    static ArtifactFactoryRequest build(

        }
    }

    @Override
    public boolean isMerged() {
        return merged;
    }

    @Override
    public String getGroupId() {
        return emptify(metadata.getGroupId());
    }

    @Override
    public String getArtifactId() {
        return metadata.storedInGroupDirectory() ? "" : emptify(metadata.getArtifactId());
    }

    @Override

/**
 * A dependency exclusion.
 *
 * @since 4.0.0
 * @see DependencyCoordinates#getExclusions()
 */
@Experimental
public interface Exclusion {
    @Nullable
    String getGroupId();

    @Nullable
    String getArtifactId();

        this.cause = cause;

        this.dependency = dependency;
    }

    private static String formatLocationInPom(Dependency dependency) {
        return "Dependency: " + ArtifactUtils.versionlessKey(dependency.getGroupId(), dependency.getArtifactId());
    }

    public Dependency getDependency() {
        return dependency;
    }

    public String getProjectId() {
        return projectId;
    }

        try {
            PluginPrefixResult result = pluginPrefixResolver.resolve(request);

            Plugin plugin = new Plugin();
            plugin.setGroupId(result.getGroupId());
            plugin.setArtifactId(result.getArtifactId());

            return plugin;
        } catch (NoPluginFoundForPrefixException e) {
            return null;
        }
    }

        {
            if ( d.getExclusions() != null )
            {
                for ( Exclusion e : d.getExclusions() )
                {
                    exclusions.add(  e.getGroupId() + ":" + e.getArtifactId() );
                }
            }
        }

        ArtifactFilter scopeFilter = new ScopeArtifactFilter( scope );

        ArtifactFilter filter;

    }

    @Nonnull
    default ArtifactCoordinates create(@Nonnull Session session, Artifact artifact) {
        return create(ArtifactCoordinatesFactoryRequest.build(
                session,
                artifact.getGroupId(),
                artifact.getArtifactId(),
                artifact.getVersion().toString(),
                artifact.getClassifier(),
                artifact.getExtension(),
                null));
    }