assertFalse(entries.contains(Maps.<String, @Nullable Boolean>immutableEntry("c", null)));
    assertFalse(entries.contains(Maps.<@Nullable String, Boolean>immutableEntry(null, true)));
  }

  @Override
  public void testKeySetRemoveAllNullFromEmpty() {
    try {
      super.testKeySetRemoveAllNullFromEmpty();
    } catch (RuntimeException tolerated) {

    private var bodyVar: MockResponseBody? = null
    private var streamHandlerVar: StreamHandler? = null
    private var webSocketListenerVar: WebSocketListener? = null

    var body: MockResponseBody?
      get() = bodyVar
      set(value) {
        bodyVar = value
        streamHandlerVar = null
        webSocketListenerVar = null
      }

                new DefaultType(Type.POM, Language.NONE, "pom", null, false),
                new DefaultType(Type.BOM, Language.NONE, "pom", null, false),
                new DefaultType(Type.MAVEN_PLUGIN, Language.JAVA_FAMILY, "jar", null, false, JavaPathType.CLASSES),
                // Java types
                new DefaultType(
                        Type.JAR, Language.JAVA_FAMILY, "jar", null, false, JavaPathType.CLASSES, JavaPathType.MODULES),

        doUpdate(entity, null);
    }

    public void insertOrUpdate(WebAuthentication entity) {
        doInsertOrUpdate(entity, null, null);
    }

    public void insertOrUpdate(WebAuthentication entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsertOrUpdate(entity, null, null);
    }

        TreeMultimap.create(StringLength.COMPARATOR, DECREASING_INT_COMPARATOR);
    multimap.put("google", 2);
    multimap.put("google", 6);
    multimap.put(null, 3);
    multimap.put(null, 1);
    multimap.put(null, 7);
    multimap.put("tree", 0);
    multimap.put("tree", null);
    return multimap;
  }

  /** Test that a TreeMultimap created from another uses the natural ordering. */

    /**
     * Creates an artifact.
     *
     * @param request the request holding artifact creation parameters
     * @return an {@code Artifact}, never {@code null}
     * @throws IllegalArgumentException if {@code request} is null or {@code request.session} is null or invalid
     */
    @Nonnull
    Artifact create(@Nonnull ArtifactFactoryRequest request);

    @Nonnull
    default Artifact create(

    }

    public void myspecifyPropertyCancel(String propertyName) {
        if (__specifiedProperties != null) {
            __specifiedProperties.remove(propertyName);
        }
    }

    public void clearSpecifiedInfo() {
        if (__specifiedProperties != null) {
            __specifiedProperties.clear();
        }
    }

    protected void checkSpecifiedProperty(String propertyName) {

    private static final Logger logger = Logger.getLogger(StatementUtil.class);

    /**
     * SQLを実行します。
     *
     * @param statement
     *            {@link Statement}。{@literal null}であってはいけません
     * @param sql
     *            SQL文字列。{@literal null}や空文字列であってはいけません
     * @return 実行した結果
     * @see Statement#execute(String)
     */
    public static boolean execute(final Statement statement, final String sql) {

      val body = response.body
      val streamHandler = response.streamHandler
      val outFinished = (
        body == null &&
          response.pushPromises.isEmpty() &&
          streamHandler == null
      )
      val flushHeaders = body == null || bodyDelayNanos != 0L
      require(!outFinished || trailers.size == 0) {
        "unsupported: no body and non-empty trailers $trailers"
      }

    Converter<String, Number> converter = Converter.<String, Number>from(forward, backward);

    assertNull(converter.convert(null));
    assertNull(converter.reverse().convert(null));

    assertEquals((Integer) 5, converter.convert("5"));
    assertEquals("5", converter.reverse().convert(5));
  }

  // Null-passthrough violates our nullness annotations, so we don't support it under J2KT.
  @J2ktIncompatible