}

            Collection<String> versions =
                    new LinkedHashSet<>(recessive.getVersioning().getVersions());
            versions.addAll(versioning.getVersions());
            versioning.setVersions(new ArrayList<>(versions));
        }

        // just carry-on as-is
        if (!recessive.getPlugins().isEmpty()) {

    @Nonnull
    List<Version> getVersions();

    @Nonnull
    default Optional<Version> getLowerVersion() {
        return getVersions().isEmpty()
                ? Optional.empty()
                : Optional.of(getVersions().get(0));
    }

    @Nonnull
    default Optional<Version> getHigherVersion() {
        return getVersions().isEmpty()
                ? Optional.empty()

        /*
        Dependency dep1 = new Dependency();
        dep1.setGroupId( "test" );
        dep1.setArtifactId( "test-artifact" );
        dep1.setVersion( "1" );
        dep1.setType( "jar" );

        Exclusion exc = new Exclusion();
        exc.setGroupId( "test" );
        exc.setArtifactId( "test-artifact3" );

        dep1.addExclusion( exc );

            }
        }
    }

    //
    // CI friendly versions
    //
    void handleCiFriendlyVersion(TransformerContext context, Model model) {
        String version = model.getVersion();
        String modVersion = replaceCiFriendlyVersion(context, version);
        model.setVersion(modVersion);

        if (Artifact.LATEST_VERSION.equals(version) || Artifact.RELEASE_VERSION.equals(version)) {
            // meta-versions are not valid <version/> values...don't write them.
            metadata.setVersion(null);
        }

        if (changed || !metadataFile.exists()) {
            metadataFile.getParentFile().mkdirs();
            try (OutputStream output = Files.newOutputStream(metadataFile.toPath())) {

    }

    /** {@inheritDoc} */
    public String getVersion() {
        return artifact.getVersion();
    }

    /** {@inheritDoc} */
    public void setVersion(String version) {
        artifact.setVersion(version);
    }

    /** {@inheritDoc} */
    public String getScope() {
        return artifact.getScope();
    }

    /** {@inheritDoc} */
    public String getType() {

        Metadata metadata = new Metadata();
        metadata.setVersioning(versioning);
        metadata.setGroupId(artifact.getGroupId());
        metadata.setArtifactId(artifact.getArtifactId());
        metadata.setVersion(artifact.getBaseVersion());
        metadata.setModelVersion("1.1.0");
        return metadata;
    }

    public void bind(Artifact artifact) {
        artifacts.add(artifact);
    }

    @Deprecated

    //    public void init( ArtifactMetadata af )
    //    {
    //        setGroupId( af.getGroupId() );
    //        setArtifactId( af.getArtifactId() );
    //        setVersion( af.getVersion() );
    //        setType( af.getType() );
    //        setScope( af.getScope() );
    //        setClassifier( af.getClassifier() );
    //        //setUri( af.getDownloadUrl() );
    //

            Object key = RemoteSnapshotMetadata.getKey(artifact);
            RemoteSnapshotMetadata snapshotMetadata = snapshots.get(key);
            if (snapshotMetadata != null) {
                artifact = artifact.setVersion(snapshotMetadata.getExpandedVersion(artifact));
            }
        }

        return artifact;
    }

    @Override

    }

    public void setArtifactId(String artifactId) {
        this.artifactId = artifactId;
    }

    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }

    public String getClassifier() {
        return classifier;
    }

    public void setClassifier(String classifier) {