private SmbComBlankResponse blank_resp = null;
    private DfsReferral dfsReferral = null; // For getDfsPath() and getServerWithDfs()

    /**
     * DFS resolver instance
     */
    protected static Dfs dfs;

    NtlmPasswordAuthentication auth; // Cannot be null
    SmbTree tree = null; // Initially null
    String unc; // Initially null; set by getUncPath; never ends with '/'

        this.locations = Collections.singletonMap(0, this);
        this.importedFrom = null;
    }

    public InputLocation(int lineNumber, int columnNumber) {
        this(lineNumber, columnNumber, null, null);
    }

    public InputLocation(int lineNumber, int columnNumber, InputSource source) {
        this(lineNumber, columnNumber, source, null);
    }

    protected ResponseData processRequest(final String uri, final boolean includeContent) {
        if (smbAuthenticationHolder == null) {
            init();
        }

        // start
        AccessTimeoutTarget accessTimeoutTarget = null;
        TimeoutTask accessTimeoutTask = null;
        if (accessTimeout != null) {
            accessTimeoutTarget = new AccessTimeoutTarget(Thread.currentThread());

        factoryField.setAccessible(true);
        factoryField.set(null, null);

        // Clear the protocol handlers cache
        Field handlersField = Handler.class.getDeclaredField("PROTOCOL_HANDLERS");
        handlersField.setAccessible(true);
        @SuppressWarnings("unchecked")
        Map<String, URLStreamHandler> handlers = (Map<String, URLStreamHandler>) handlersField.get(null);
        handlers.clear();
    }

    /**

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

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

    public void test_constructor_withNullCause() {
        // Test constructor with null cause
        String message = "Test with null cause";

        return toFloat(o, null);
    }

    /**
     * Converts to {@link Float}.
     *
     * @param o
     *            The object to convert
     * @param pattern
     *            The pattern string
     * @return The converted {@link Float}
     */
    public static Float toFloat(final Object o, final String pattern) {
        if (o == null) {
            return null;

        return Stream.of(
                Arguments.of(null, null, null),
                Arguments.of("", "", ""),
                Arguments.of(null, "artifactId", "1.0"),
                Arguments.of("", "artifactId", "1.0"),
                Arguments.of("groupId", null, "1.0"),
                Arguments.of("groupId", "", "1.0"),
                Arguments.of("groupId", "artifactId", null),

      throws InvocationTargetException, IllegalAccessException {
    T returnValue = factory.invoke(null, args.toArray());
    if (returnValue == null) {
      Assert.assertTrue(
          factory + " returns null but it's not annotated with @Nullable", isNullable(factory));
    }
    return returnValue;
  }

  /**

    }

    @Override
    public String getBaseVersion() {
        if (baseVersion == null && version != null) {
            setBaseVersionInternal(version);
        }

        return baseVersion;
    }

    protected String getBaseVersionInternal() {
        if ((baseVersion == null) && (version != null)) {
            setBaseVersionInternal(version);
        }

        return baseVersion;
    }

        // Create item and then set inputs to null via reflection or subclass
        CharMappingItem item = new CharMappingItem(1L, new String[] { "temp" }, "output") {
            @Override
            public String getInputsValue() {
                // Simulate null inputs scenario
                if (getInputs() == null) {
                    return super.getInputsValue();
                }