* @return {@code string} if it is not null; {@code ""} otherwise
   */
  static String nullToEmpty(@Nullable String string) {
    return (string == null) ? "" : string;
  }

  /**
   * Returns the string if it is not empty, or a null string otherwise.
   *
   * @param string the string to test and possibly return
   * @return {@code string} if it is not empty; {@code null} otherwise
   */

                null,
                dependency.getType()));
    }

    @Nonnull
    default DependencyCoordinates create(@Nonnull Session session, Plugin plugin) {
        // TODO: hard coded string
        return create(DependencyCoordinatesFactoryRequest.build(
                session, plugin.getGroupId(), plugin.getArtifactId(), plugin.getVersion(), null, null, "maven-plugin"));
    }

    @Nonnull

        // Test constructor with null message
        ScheduledJobException exception = new ScheduledJobException(null);

        assertNull(exception.getMessage());
        assertNull(exception.getCause());
    }

    public void test_constructorWithNullMessageAndCause() {
        // Test constructor with null message and null cause

        // Test constructor with null message
        StorageException exception = new StorageException(null);

        assertNotNull(exception);
        assertNull(exception.getMessage());
        assertNull(exception.getCause());
    }

    public void test_constructorWithNullMessageAndCause() {
        // Test constructor with null message and null cause

                }));
    expectReplacement(entry(getKeyForNullValue(), v3()));
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
  public void testMergeAbsentNullKey() {
    assertEquals(
        "Map.merge(null, value, function) should return value",
        v3(),
        getMap()
            .merge(
                null,
                v3(),

        final String content = xmlExtractor.getText(in, null).getContent();
        CloseableUtil.closeQuietly(in);
        logger.info(content);
        assertTrue(content.contains("テスト"));
        assertTrue(content.contains("コメント"));
    }

    public void test_getXml_null() {
        try {
            xmlExtractor.getText(null, null);
            fail();
        } catch (final CrawlerSystemException e) {

        if (accessResult != null) {
            final AccessResultData<?> accessResultData = accessResult.getAccessResultData();
            if (accessResultData != null && accessResultData.getEncoding() != null) {
                enc = accessResultData.getEncoding();
                parentEncodingMap.put(key, enc);
                return enc;
            }
        }
        return null;
    }

    /**

        this.open = false;
        if (this.input != null) {
            this.input.close();
            this.input = null;
        }

        if (this.output != null) {
            this.output.close();
            this.output = null;
        }

        try {
            if (wasOpen) {
                this.handle.close();
            } else if (this.handle != null) {
                this.handle.release();

     * @return This request, never {@code null}.
     */
    @Override
    MetadataResolutionRequest setOffline(boolean offline);

    /**
     * Gets the artifact to resolve metadata for.
     *
     * @return The artifact to resolve metadata for or {@code null} if not set.
     */
    Artifact getArtifact();

    /**

        if (username != null) {
            AccountAttempts account = accountAttempts.get(username);
            if (account != null) {
                account.reset();
            }
        }

        if (sourceIp != null) {
            IpAttempts ip = ipAttempts.get(sourceIp);
            if (ip != null) {
                ip.recordSuccess();
            }
        }