static <K, V> ImmutableMap<K, V> asImmutable(Map<K, V> map) {
    for (Entry<K, V> entry : checkNotNull(map).entrySet()) {
      checkNotNull(entry.getKey());
      checkNotNull(entry.getValue());
    }
    return new ImmutableEnumMap<K, V>(map);
  }

  private ImmutableEnumMap(Map<? extends K, ? extends V> delegate) {
    super(delegate);
  }

        final List<Map<String, String>> itemList = new ArrayList<>();
        for (final Map.Entry<String, String> entry : System.getenv().entrySet()) {
            itemList.add(createItem(entry.getKey(), entry.getValue()));
        }
        return itemList;
    }

    /**
     * Gets a list of system properties as key-value pairs.
     *
     * @return list of system property items
     */

     * @return the converted value or the default value if not found
     */
    public static <T> T getValue(final Map<String, Object> doc, final String key, final Class<T> clazz, final T defaultValue) {
        final T value = getValue(doc, key, clazz);
        if (value == null) {
            return defaultValue;
        }
        return value;
    }

    /**

                case 0:
                    return emptyMap();
                case 1:
                    Map.Entry<K, V> entry = map.entrySet().iterator().next();
                    return singletonMap(entry.getKey(), entry.getValue());
                default:
                    return new MapN<>(map);
            }
        }
    }

    @SuppressWarnings("unchecked")
    static <K, V> Map<K, V> emptyMap() {

                      Cell<String, Integer, Character> cell =
                          (Cell<String, Integer, Character>) element;
                      table.put(cell.getRowKey(), cell.getColumnKey(), cell.getValue());
                    }
                    return table.cellSet();
                  }

                  @Override
                  Table<String, Integer, Character> createTable() {

                }

                KerberosKey serverKey = keysByAlgo.get(encType.getValue().intValue());
                if (keysByAlgo.isEmpty() || serverKey == null) {
                    throw new PACDecodingException("Kerberos key not found for eType " + encType.getValue());
                }

                try {

    ChannelState(int value) {
        this.value = value;
    }

    /**
     * Get the numeric value of this state
     *
     * @return state value
     */
    public int getValue() {
        return value;
    }

    private final int value;

    HandleType(int value) {
        this.value = value;
    }

    /**
     * Get the numeric value of this handle type
     * @return the numeric value
     */
    public int getValue() {
        return value;
    }

    /**
     * Get HandleType from numeric value
     * @param value the numeric value
     * @return the corresponding HandleType
     */

    assertEquals(null, entry.getKey());
    assertThat(entry.getValue()).containsExactly(7, 3, 1);
    entry = iterator.next();
    assertEquals("tree", entry.getKey());
    assertThat(entry.getValue()).containsExactly(null, 0);
    entry = iterator.next();
    assertEquals("google", entry.getKey());
    assertThat(entry.getValue()).containsExactly(6, 2);
  }

  public void testOrderedEntries() {

    for (Entry<K, V> entry : getSampleElements()) {
      expected.add(entry.getValue());
    }
    assertEqualIgnoringOrder(expected, multimap().values());
  }

  @CollectionFeature.Require(KNOWN_ORDER)
  public void testValuesInOrder() {
    List<V> expected = new ArrayList<>();
    for (Entry<K, V> entry : getOrderedElements()) {
      expected.add(entry.getValue());
    }
    assertEqualInOrder(expected, multimap().values());
  }