assertArgumentNotNull("type", type);
        assertArgumentNotNull("clazz", clazz);

        if (type instanceof Class) {
            return clazz.isAssignableFrom((Class<?>) type);
        }
        if (type instanceof ParameterizedType) {
            final ParameterizedType parameterizedType = ParameterizedType.class.cast(type);

      if (Modifier.isPublic(field.getModifiers())
          && Modifier.isStatic(field.getModifiers())
          && Modifier.isFinal(field.getModifiers())) {
        if (field.getGenericType() == field.getType() && type.isAssignableFrom(field.getType())) {
          field.setAccessible(true);
          try {
            T constant = type.cast(field.get(null));
            if (constant != null) {
              return constant;
            }

      }
    };

    static final JavaVersion CURRENT;

    static {
      // Under Android, TypeVariable does not implement AnnotatedElement even under recent versions.
      if (AnnotatedElement.class.isAssignableFrom(TypeVariable.class)) {
        if (new TypeCapture<Entry<String, int[][]>>() {}.capture()
            .toString()
            .contains("java.util.Map.java.util.Map")) {
          CURRENT = JAVA8;
        } else {

            t = AuthenticationType.NULL;
        }
        return t;
    }

    @SuppressWarnings("unchecked")
    @Override
    public <T extends Credentials> T unwrap(Class<T> t) {
        if (t.isAssignableFrom(this.getClass())) {
            return (T) this;
        }
        return null;
    }

    @Override
    public Subject getSubject() {
        return null;
    }

    @Override

     *
     * @see jcifs.SmbSession#unwrap(java.lang.Class)
     */
    @SuppressWarnings("unchecked")
    @Override
    public <T extends SmbSession> T unwrap(Class<T> type) {
        if (type.isAssignableFrom(this.getClass())) {
            return (T) this;
        }
        throw new ClassCastException();
    }

    /**
     * @return session increased usage count
     */

     *
     * @see jcifs.SmbTransport#unwrap(java.lang.Class)
     */
    @SuppressWarnings("unchecked")
    @Override
    public <T extends SmbTransport> T unwrap(final Class<T> type) {
        if (type.isAssignableFrom(this.getClass())) {
            return (T) this;
        }
        throw new ClassCastException();
    }

    /**
     *
     * @param tf
     * @return a session for the context
     */

  private static void assertSubtypeBeforeSupertype(Iterable<? extends Class<?>> types) {
    int i = 0;
    for (Class<?> left : types) {
      int j = 0;
      for (Class<?> right : types) {
        if (left.isAssignableFrom(right)) {
          assertTrue(left + " should be after " + right, i >= j);
        }
        j++;
      }
      i++;
    }
  }

  // Tests to make sure assertSubtypeBeforeSupertype() works.

  private static void assertSubtypeBeforeSupertype(Iterable<? extends Class<?>> types) {
    int i = 0;
    for (Class<?> left : types) {
      int j = 0;
      for (Class<?> right : types) {
        if (left.isAssignableFrom(right)) {
          assertTrue(left + " should be after " + right, i >= j);
        }
        j++;
      }
      i++;
    }
  }

  // Tests to make sure assertSubtypeBeforeSupertype() works.