EnumHashBiMap.create(emptyBimap);
    assertEquals(bimap3, emptyBimap);
  }

  @GwtIncompatible // keyType
  public void testKeyType() {
    EnumHashBiMap<Currency, String> bimap = EnumHashBiMap.create(Currency.class);
    assertEquals(Currency.class, bimap.keyType());
  }

  public void testEntrySet() {
    // Bug 3168290
    Map<Currency, String> map =
        ImmutableMap.of(

    assertEquals(bimap3, emptyBimap);
  }

  @GwtIncompatible // keyType
  public void testKeyType() {
    EnumBiMap<Currency, Country> bimap = EnumBiMap.create(Currency.class, Country.class);
    assertEquals(Currency.class, bimap.keyType());
  }

  @GwtIncompatible // valueType
  public void testValueType() {

    assertEquals("java.lang.String", new Entry<String, Integer>() {}.keyType().toString());
  }

  private static <K, V> TypeToken<Map<K, V>> mapOf(Class<K> keyType, Class<V> valueType) {
    return new TypeToken<Map<K, V>>() {}.where(new TypeParameter<K>() {}, keyType)
        .where(new TypeParameter<V>() {}, valueType);
  }

called the key type.
The <a href="#Representation_of_values">value</a> of an uninitialized map is <code>nil</code>.
</p>

<pre class="ebnf">
MapType = "map" "[" KeyType "]" ElementType .
KeyType = Type .
</pre>

<p>
The <a href="#Comparison_operators">comparison operators</a>
<code>==</code> and <code>!=</code> must be fully defined