String version = null;
        Snapshot snapshot = versioning.getSnapshot();
        if (snapshot != null) {
            if (snapshot.getTimestamp() != null && snapshot.getBuildNumber() > 0) {
                String newVersion = snapshot.getTimestamp() + "-" + snapshot.getBuildNumber();
                version = baseVersion.replace(Artifact.SNAPSHOT_VERSION, newVersion);
            } else {

    }

    public Object getKey() {
        return "snapshot " + artifact.getGroupId() + ":" + artifact.getArtifactId() + ":" + artifact.getBaseVersion();
    }

    public boolean isSnapshot() {
        return artifact.isSnapshot();
    }

    public int getNature() {
        return isSnapshot() ? SNAPSHOT : RELEASE;
    }

    public ArtifactRepository getRepository() {

    }

    @Override
    public String getVersion() {
        return "";
    }

    @Override
    public Nature getNature() {
        return artifact.isSnapshot() ? Nature.RELEASE_OR_SNAPSHOT : Nature.RELEASE;
    }

        throw new UnsupportedOperationException("Cannot change the version information for an attached artifact."
                + " It is derived from the main artifact.");
    }

    public boolean isSnapshot() {
        return parent.isSnapshot();
    }

    public void addMetadata(ArtifactMetadata metadata) {
        // ignore. The parent artifact will handle metadata.

    public VersionConstraint parseVersionConstraint(String constraint) {
        return modelVersionParser.parseVersionConstraint(constraint);
    }

    @Override
    public boolean isSnapshot(String version) {
        return modelVersionParser.isSnapshot(version);
    }

        assertFalse(ArtifactUtils.isSnapshot(null));
        assertFalse(ArtifactUtils.isSnapshot(""));
        assertFalse(ArtifactUtils.isSnapshot("1.2.3"));
        assertTrue(ArtifactUtils.isSnapshot("1.2.3-SNAPSHOT"));
        assertTrue(ArtifactUtils.isSnapshot("1.2.3-snapshot"));
        assertTrue(ArtifactUtils.isSnapshot("1.2.3-20090413.094722-2"));
        assertFalse(ArtifactUtils.isSnapshot("1.2.3-20090413X094722-2"));
    }

     */
    @Nonnull
    String getExtension();

    /**
     * Determines whether this artifact uses a snapshot version.
     *
     * @return {@code true} if the artifact is a snapshot, {@code false} otherwise
     * @see org.apache.maven.api.Session#isVersionSnapshot(String)
     */
    boolean isSnapshot();

    /**
     * Shortcut for {@code session.createArtifactCoordinate(artifact)}
     *

     */
    @Nonnull
    VersionConstraint parseVersionConstraint(@Nonnull String constraint);

    /**
     * Checks whether a given artifact version is considered a {@code SNAPSHOT} or not.
     */
    boolean isSnapshot(@Nonnull String version);

     */
    @Nonnull
    VersionConstraint parseVersionConstraint(@Nonnull String constraint);

    /**
     * Checks whether a given artifact version is considered a {@code SNAPSHOT} or not.
     */
    boolean isSnapshot(@Nonnull String version);

        return artifact.getExtension();
    }

    @Nonnull
    @Override
    public String getClassifier() {
        return artifact.getClassifier();
    }

    @Override
    public boolean isSnapshot() {
        return DefaultModelVersionParser.checkSnapshot(artifact.getVersion());
    }

    @Nonnull
    @Override
    public ArtifactCoordinate toCoordinate() {