if (pluginDescriptorV4 == null) {
            synchronized (this) {
                if (pluginDescriptorV4 == null) {
                    pluginDescriptorV4 = org.apache.maven.api.plugin.descriptor.PluginDescriptor.newBuilder()
                            .namespaceUri(null)
                            .modelEncoding(null)
                            .name(name)

   * {@code get(null)}, {@code keySet().contains(null)} or {@code remove(null)}.
   */
  ALLOWS_NULL_KEY_QUERIES,
  ALLOWS_NULL_KEYS(ALLOWS_NULL_KEY_QUERIES),
  /**
   * The map does not throw {@code NullPointerException} on calls such as {@code
   * containsValue(null)}, {@code values().contains(null)} or {@code values().remove(null)}.
   */
  ALLOWS_NULL_VALUE_QUERIES,

        assertThat(StringUtil.defaultString("aaa", "NULL"), is("aaa"));
        assertThat(StringUtil.defaultString("aaa", null), is("aaa"));
        assertThat(StringUtil.defaultString(null, null), is(nullValue()));
    }

    @Test
    public void testNewStringUnsafe() {
        assertNull(StringUtil.newStringUnsafe(null));
        char[] chars = new char[0];
        assertThat(StringUtil.newStringUnsafe(chars), is(""));

                    continue;
                }

                final String[] values = KuromojiCSVUtil.parse(replacedLine);
                String token = null;
                String segmentation = null;
                String reading = null;
                String pos = null;
                switch (values.length) {
                case 4:
                    pos = values[3];
                case 3:

    }

    @Test
    @DisplayName("connectLogon accepts null context but still invokes")
    void connectLogon_withNull_isInvoked() throws Exception {
        // Act
        tree.connectLogon(null);

        // Assert - even null should be passed through to implementation
        verify(tree).connectLogon(null);
    }

    @Test

    }

    @Test
    @DisplayName("URL created with handler parses SMB URL correctly")
    void testUrlCreationWithHandler() throws Exception {
        // Act - Create various SMB URLs using the handler
        URL url1 = new URL(null, "smb://host/share", handler);
        URL url2 = new URL(null, "smb://host:1234/share/file.txt", handler);

    private @Nullable EnumSet<E> set;

    void add(E e) {
      if (set == null) {
        set = EnumSet.of(e);
      } else {
        set.add(e);
      }
    }

    EnumSetAccumulator<E> combine(EnumSetAccumulator<E> other) {
      if (this.set == null) {
        return other;
      } else if (other.set == null) {
        return this;
      } else {
        this.set.addAll(other.set);

    @Override
    public DefaultModelBuildingRequest setPomFile(File pomFile) {
        this.pomFile = (pomFile != null) ? pomFile.getAbsoluteFile() : null;

        return this;
    }

    @Override
    public synchronized ModelSource getModelSource() {
        if (modelSource == null && pomFile != null) {
            modelSource = new FileModelSource(pomFile);
        }
        return modelSource;
    }

        return null;
    }

    @Override
    protected String createFromHint() {
        return null;
    }

    @Override
    protected String createSqlSuffix() {
        return null;
    }

    @Override
    public void fetchFirst(int fetchSize) {
        _fetchScopeEffective = true;
        if (fetchSize < 0) {
            String msg = "Argument[fetchSize] should be plus: " + fetchSize;

    private String getResourceName(final ResponseData responseData) {
        String name = responseData.getUrl();
        final String enc = responseData.getCharSet();

        if (name == null || enc == null) {
            return null;
        }

        name = name.replaceAll("/+$", "");
        final int idx = name.lastIndexOf('/');
        if (idx >= 0) {
            name = name.substring(idx + 1);
        }