* flexibility to load multiple version of maven into dedicated classloaders without assuming state of jvm system
     * classloader.
     */
    private static final ClassLoader PARENT_CLASSLOADER = ClassWorld.class.getClassLoader();

    private final Logger logger = LoggerFactory.getLogger(getClass());

    private final ClassWorld world;

    private final ClassRealm containerRealm;

    // this is a live injected collection

    URL getBaseUrl() throws IOException {
      // Find URL pointing to Finalizer.class file.
      String finalizerPath = FINALIZER_CLASS_NAME.replace('.', '/') + ".class";
      URL finalizerUrl = getClass().getClassLoader().getResource(finalizerPath);
      if (finalizerUrl == null) {
        throw new FileNotFoundException(finalizerPath);
      }

      // Find URL pointing to base of class path.

    URL getBaseUrl() throws IOException {
      // Find URL pointing to Finalizer.class file.
      String finalizerPath = FINALIZER_CLASS_NAME.replace('.', '/') + ".class";
      URL finalizerUrl = getClass().getClassLoader().getResource(finalizerPath);
      if (finalizerUrl == null) {
        throw new FileNotFoundException(finalizerPath);
      }

      // Find URL pointing to base of class path.

    List<Class<?>> classes = Lists.newArrayList();
    String packageName = getClass().getPackage().getName();
    for (ClassPath.ClassInfo classInfo :
        ClassPath.from(getClass().getClassLoader()).getTopLevelClasses(packageName)) {
      Class<?> cls;
      try {
        cls = classInfo.load();
      } catch (NoClassDefFoundError e) {

    List<Class<?>> classes = Lists.newArrayList();
    String packageName = getClass().getPackage().getName();
    for (ClassPath.ClassInfo classInfo :
        ClassPath.from(getClass().getClassLoader()).getTopLevelClasses(packageName)) {
      Class<?> cls;
      try {
        cls = classInfo.load();
      } catch (NoClassDefFoundError e) {

                new NtlmSsp();
            }
            else {
                this.credentialsSupplied = true;
            }

            try {
                try ( InputStream is = getClass().getClassLoader().getResourceAsStream("jcifs/http/ne.css"); ) {
                    while ( ( n = is.read(buf) ) != -1 ) {
                        sb.append(new String(buf, 0, n, "ISO8859_1"));
                    }

            ntlmSsp = new NtlmSsp();
        } else {
            credentialsSupplied = true;
        }

        try {
            mimeMap = new MimeMap();
            is = getClass().getClassLoader().getResourceAsStream( "jcifs/smb1/http/ne.css" );
            while(( n = is.read( buf )) != -1 ) {
                sb.append( new String( buf, 0, n, "ISO8859_1" ));
            }
            style = sb.toString();

        return clazz.getName().replace('.', '/') + ".class";
    }

    /**
     * コンテキストクラスローダを返します。
     *
     * @return コンテキストクラスローダ
     */
    public static ClassLoader getClassLoader() {
        return Thread.currentThread().getContextClassLoader();
    }

    /**
     * コンテキストクラスローダからリソースを返します。
     *
     * @param path
     *            リソースのパス。{@literal null}や空文字列であってはいけません

                    getExtensionComponents(session.getProjects(), AbstractMavenLifecycleParticipant.class)) {
                Thread.currentThread().setContextClassLoader(listener.getClass().getClassLoader());
                method.run(listener, session);
            }
        } finally {
            Thread.currentThread().setContextClassLoader(originalClassLoader);
        }
    }

    PopulatableMapAsMultimap() {
      this.map = newHashMap();
      this.unusableDelegate =
          (SetMultimap<K, V>)
              newProxyInstance(
                  SetMultimap.class.getClassLoader(),
                  new Class<?>[] {SetMultimap.class},
                  new InvocationHandler() {
                    @Override
                    public Object invoke(Object proxy, Method method, Object[] args)