}

    @Override
    public Set<Entry<String, String>> entrySet() {
        return new AbstractSet<Entry<String, String>>() {
            @Override
            public Iterator<Entry<String, String>> iterator() {
                Iterator<Entry<Object, Object>> iterator = properties.entrySet().iterator();
                return new Iterator<Entry<String, String>>() {
                    Entry<String, String> next;

                    {

                boolean caseSensitive = !Os.IS_WINDOWS;
                for (Map.Entry<String, String> entry : System.getenv().entrySet()) {
                    String key = "env."
                            + (caseSensitive ? entry.getKey() : entry.getKey().toUpperCase(Locale.ENGLISH));
                    tmp.setProperty(key, entry.getValue());
                }
                envVars = tmp;
            }

 *
 */
@Deprecated
public class MetadataGraph {
    /** all graph nodes */
    Collection<MetadataGraphNode> nodes;

    /** entry point for tree-like structures */
    MetadataGraphNode entry;

    public MetadataGraph(MetadataGraphNode entry) {
        this();

        this.entry = entry;
    }

    public MetadataGraph() {
        nodes = new ArrayList<>(64);
    }

        Set<String> artifacts = new LinkedHashSet<>();
        Set<String> packages = new LinkedHashSet<>();

        try {
            for (File entry : classpath) {
                ExtensionDescriptor descriptor = BUILDER.build(entry);
                if (descriptor != null) {
                    artifacts.addAll(descriptor.getExportedArtifacts());

                // single entry in the classpath, populated from itself
                ArtifactMetadata amd = cleanGraph.getEntry().getMd();
                cpc.add(amd);
            } else {
                ClasspathGraphVisitor v = new ClasspathGraphVisitor(cleanGraph, cpc);
                MetadataGraphVertex entry = cleanGraph.getEntry();
                // entry point
                v.visit(entry);
            }

        for (Map.Entry<String, Map<Integer, List<MojoExecution>>> entry : mappings.entrySet()) {
            List<MojoExecution> mojoExecutions = new ArrayList<>();

            for (List<MojoExecution> executions : entry.getValue().values()) {
                mojoExecutions.addAll(executions);
            }

            lifecycleMappings.put(entry.getKey(), mojoExecutions);
        }

                        } else {
                            throw new IllegalArgumentException("Unrecognized entry: " + l);
                        }
                        String[] parts = l.split(splitExpr);
                        if (parts.length < 1) {
                            throw new IllegalArgumentException("Unrecognized entry: " + l);
                        }
                        Artifact s = parseArtifact(parts[0]);

                for (Map.Entry<Object, Plugin> entry : master.entrySet()) {
                    List<Plugin> pre = predecessors.get(entry.getKey());
                    if (pre != null) {
                        result.addAll(pre);
                    }
                    result.add(entry.getValue());
                }
                result.addAll(pending);

        assertEquals(
                2,
                res.getExcidentEdges(v1).size(),
                "wrong # of excident edges in the resulting graph entry after resolver");

        assertEquals(
                1,
                res.getIncidentEdges(v2).size(),
                "wrong # of v2 incident edges in the resulting graph after resolver");
        assertEquals(

            return null;
        }

        if (lifecyclePhases.isEmpty()) {
            return Collections.emptyMap();
        }

        Map<String, String> phases = new LinkedHashMap<>();
        for (Map.Entry<String, LifecyclePhase> e : lifecyclePhases.entrySet()) {
            phases.put(e.getKey(), e.getValue().toString());
        }
        return phases;
    }