* called by the {@link #escape(String)} method when it discovers that escaping is required. It is
   * protected to allow subclasses to override the fastpath escaping function to inline their
   * escaping test. See {@link CharEscaperBuilder} for an example usage.
   *
   * <p>This method is not reentrant and may only be invoked by the top level {@link

        // In regex, + means "one or more" of the previous character
        String wrongPattern = "(application/xhtml+xml|application/rdf+xml)";
        Pattern pattern = Pattern.compile(wrongPattern);

        // Without escaping, "application/xhtml+xml" does NOT match
        // because the pattern expects "one or more 'l'" followed by "xml"
        assertFalse(pattern.matcher("application/xhtml+xml").matches());

    assertEscaping(xmlEscaper, "\uFFFD", '\uFFFF');

    assertWithMessage("0xFFFE is forbidden and should be replaced during escaping")
        .that(xmlEscaper.escape("[\ufffe]"))
        .isEqualTo("[\uFFFD]");
    assertWithMessage("0xFFFF is forbidden and should be replaced during escaping")
        .that(xmlEscaper.escape("[\uffff]"))
        .isEqualTo("[\uFFFD]");
  }

        assertEquals("hello world", getQuery("hello world", new String[0], Collections.emptyMap(), Collections.emptyMap(), false));
    }

    @Test
    public void test_escapeQuery() {
        // Test escaping functionality through escape parameter
        assertEquals("test", getQuery("test", new String[0], Collections.emptyMap(), Collections.emptyMap(), false));

    if (uriStripped) {
      if (uri.toString() != component.urlString("")) {
        fail("Encoding $component $codePoint using $encoding")
      }
      return
    }

    // If the URI has more escaping than the HttpURL, check that the decoded values still match.
    val uriEscaped = uriEscapedCodePoints.indexOf(codePointString) != -1
    if (uriEscaped) {
      if (uri.toString() == httpUrl.toString()) {

    assertEscaping(xmlEscaper, "\uFFFD", '\uFFFF');

    assertWithMessage("0xFFFE is forbidden and should be replaced during escaping")
        .that(xmlEscaper.escape("[\ufffe]"))
        .isEqualTo("[\uFFFD]");
    assertWithMessage("0xFFFF is forbidden and should be replaced during escaping")
        .that(xmlEscaper.escape("[\uffff]"))
        .isEqualTo("[\uFFFD]");
  }

        generator = new TestThumbnailGenerator();

        // The pattern as it would be loaded from XML: "image/svg\+xml"
        // In XML, a single backslash is passed directly (no Java string escaping)
        // So we use a literal backslash here to simulate XML-loaded value
        String xmlLoadedPattern = "image/svg" + "\\" + "+xml"; // Simulates XML value: image/svg\+xml

  static void assertBasicUrlEscaperExceptPercent(UnicodeEscaper e) {
    // URL escapers should throw null pointer exceptions for null input
    try {
      e.escape((String) null);
      fail("Escaping null string should throw exception");
    } catch (NullPointerException x) {
      // pass
    }

    // All URL escapers should leave 0-9, A-Z, a-z unescaped
    assertUnescaped(e, 'a');
    assertUnescaped(e, 'z');

  static void assertBasicUrlEscaperExceptPercent(UnicodeEscaper e) {
    // URL escapers should throw null pointer exceptions for null input
    try {
      e.escape((String) null);
      fail("Escaping null string should throw exception");
    } catch (NullPointerException x) {
      // pass
    }

    // All URL escapers should leave 0-9, A-Z, a-z unescaped
    assertUnescaped(e, 'a');
    assertUnescaped(e, 'z');

        request.setStream(true);

        streamChatWithConcurrencyControl(request, callback);
    }

    // --- Prompt building methods ---

    /**
     * Wraps user input with delimiters, escaping any closing tags in the content.
     *
     * @param userMessage the user's message to wrap
     * @return the wrapped user input
     */
    protected String wrapUserInput(final String userMessage) {