java.util.Set<String> methodNames =
                    java.util.Arrays.stream(methods).map(java.lang.reflect.Method::getName).collect(java.util.stream.Collectors.toSet());

            assertTrue(methodNames.contains("close"), "Should contain close method");
            assertTrue(methodNames.contains("getConfig"), "Should contain getConfig method");
            assertTrue(methodNames.contains("unwrap"), "Should contain unwrap method");

        }
    }

    // Helper method to invoke protected method using reflection
    private ClassificationMeta invokeMethod(Object obj, String methodName, String param) {
        try {
            java.lang.reflect.Method method = obj.getClass().getDeclaredMethod(methodName, String.class);
            method.setAccessible(true);
            return (ClassificationMeta) method.invoke(obj, param);
        } catch (Exception e) {

    private static Object invokePrivate(Object targetOrClass, String methodName, Class<?>[] paramTypes, Object... args) {
        try {
            final Class<?> cls = targetOrClass instanceof Class<?> ? (Class<?>) targetOrClass : targetOrClass.getClass();
            Method m = cls.getDeclaredMethod(methodName, paramTypes);
            m.setAccessible(true);

        throws Throwable {
      String methodName = method.getName();
      Method typeVariableMethod = typeVariableMethods.get(methodName);
      if (typeVariableMethod == null) {
        throw new UnsupportedOperationException(methodName);
      } else {
        try {
          return typeVariableMethod.invoke(typeVariableImpl, args);

            }
        }
        return null;
    }

    private Method findMethod(Class<?> clazz, String methodName, Class<?>... paramTypes) {
        while (clazz != null) {
            try {
                return clazz.getDeclaredMethod(methodName, paramTypes);
            } catch (NoSuchMethodException e) {
                clazz = clazz.getSuperclass();
            }
        }

    }

    private Method getSuperclassMethod(Class<?> clazz, String methodName, Class<?>... paramTypes) throws NoSuchMethodException {
        while (clazz != null) {
            try {
                return clazz.getDeclaredMethod(methodName, paramTypes);
            } catch (NoSuchMethodException e) {
                clazz = clazz.getSuperclass();
            }
        }

    }

    private Method getSuperclassMethod(Class<?> clazz, String methodName, Class<?>... paramTypes) throws NoSuchMethodException {
        while (clazz != null) {
            try {
                return clazz.getDeclaredMethod(methodName, paramTypes);
            } catch (NoSuchMethodException e) {
                clazz = clazz.getSuperclass();
            }
        }

        throws Throwable {
      String methodName = method.getName();
      Method typeVariableMethod = typeVariableMethods.get(methodName);
      if (typeVariableMethod == null) {
        throw new UnsupportedOperationException(methodName);
      } else {
        try {
          return typeVariableMethod.invoke(typeVariableImpl, args);

    }

    /**
     * Helper method to invoke protected/private method using reflection
     */
    private Object invokeMethod(Object obj, String methodName, Class<?>[] paramTypes, Object... args) throws Exception {
        Method method = obj.getClass().getDeclaredMethod(methodName, paramTypes);
        method.setAccessible(true);
        return method.invoke(obj, args);
    }

    /**

   */
  public static HashFunction hmacSha512(byte[] key) {
    return hmacSha512(new SecretKeySpec(checkNotNull(key), "HmacSHA512"));
  }

  private static String hmacToString(String methodName, Key key) {
    return "Hashing."
        + methodName
        + "(Key[algorithm="
        + key.getAlgorithm()
        + ", format="
        + key.getFormat()
        + "])";
  }

  /**