Metadata repoMetadata = metadata.getMetadata();
        if ((repoMetadata != null)
                && (repoMetadata.getVersioning() != null
                        && repoMetadata.getVersioning().getSnapshot() != null)) {
            buildNumber = repoMetadata.getVersioning().getSnapshot().getBuildNumber();
        }
        return buildNumber;
    }

    public static DateFormat getUtcDateFormatter() {

        Versioning original = metadata.getVersioning();

        Versioning.Builder versioning = Versioning.newBuilder(original);
        versioning.lastUpdated(fmt.format(timestamp));

        if (recessive.getVersioning() != null) {
            if (original.getLatest() == null) {
                versioning.latest(recessive.getVersioning().getLatest());
            }

                    if (m.getVersioning() == null) {
                        m.setVersioning(new Versioning());
                    }

                    if (m.getVersioning().getSnapshot() == null) {
                        m.getVersioning().setSnapshot(new Snapshot());
                    }
                } else {
                    if ((m.getVersioning() != null)

                    .lastUpdated(lastUpdated)
                    .build();

            metadata = metadata.withVersioning(versioning);
        } else {
            snapshot = metadata.getVersioning().getSnapshot();
            lastUpdated = metadata.getVersioning().getLastUpdated();
        }

        for (Artifact artifact : artifacts) {
            String version = artifact.getVersion();

            if (version.endsWith(SNAPSHOT)) {

            metadata = metadata.withPlugins(mergedPlugins.values());
        }
        // just carry-on as-is
        if (recessive.getVersioning() != null) {
            metadata = metadata.withVersioning(recessive.getVersioning());
        }
    }

    @Deprecated
    @Override
    public MavenMetadata setFile(File file) {
        return new PluginsMetadata(pluginInfo, file.toPath(), timestamp);

    }

    @Override
    protected void merge(Metadata recessive) {
        metadata = metadata.withVersioning(metadata.getVersioning().withLastUpdated(fmt.format(timestamp)));

        String lastUpdated = metadata.getVersioning().getLastUpdated();

        Map<String, SnapshotVersion> versions = new LinkedHashMap<>();

        for (Artifact artifact : artifacts) {

        artifact.addMetadata(metadata);

        Metadata repoMetadata = metadata.getMetadata();
        String version = null;
        if (repoMetadata != null && repoMetadata.getVersioning() != null) {
            version = constructVersion(repoMetadata.getVersioning(), artifact.getBaseVersion());
        }

        if (version == null) {
            // use the local copy, or if it doesn't exist - go to the remote repo for it

                changed = true;
            }
        }

        Versioning versioning = sourceMetadata.getVersioning();
        if ( versioning != null )
        {
            Versioning v = getVersioning();
            if ( v == null )
            {
                v = new Versioning();
                setVersioning( v );
                changed = true;
            }

            Metadata repoMetadata, List<String> availableVersions) {
        Collection<String> versions = new LinkedHashSet<>();

        if ((repoMetadata != null) && (repoMetadata.getVersioning() != null)) {
            versions.addAll(repoMetadata.getVersioning().getVersions());
        }

        versions.addAll(availableVersions);

        List<ArtifactVersion> artifactVersions = new ArrayList<>(versions.size());

                        try (InputStream in = Files.newInputStream(metadata.getPath())) {
                            versioning =
                                    new MetadataStaxReader().read(in, false).getVersioning();
                        }
                    }
                }
            }
        } catch (Exception e) {
            invalidMetadata(session, trace, metadata, repository, e);