value = "${spaces}";
        assertEquals("   ", ResourceUtil.resolve(value));

        // Test long property name
        System.setProperty("very.long.property.name.with.many.dots", "long");
        value = "${very.long.property.name.with.many.dots}";
        assertEquals("long", ResourceUtil.resolve(value));

        // Test multiple occurrences of same variable
        System.setProperty("repeat", "X");

    }

    public void test_complex_field_names() {
        // Test various complex field names
        String[] fieldNames = { "simple_field", "field-with-dashes", "field.with.dots", "field_with_underscores", "fieldWithCamelCase",
                "field with spaces", "field@with#special!chars", "フィールド名", "字段名称", "필드명" };

        for (String fieldName : fieldNames) {

        // Test with special characters in keys and values
        value = "key.with.dots=value\nkey_with_underscores=value with spaces\nkey-with-dashes=value@#$%";
        paramMap = ParameterUtil.parse(value);
        assertEquals(3, paramMap.size());
        assertEquals("value", paramMap.get("key.with.dots"));
        assertEquals("value with spaces", paramMap.get("key_with_underscores"));

            assertEquals(arrayValue, value);
        } finally {
            System.clearProperty(Constants.FESS_CONFIG_PREFIX + arrayKey);
        }
    }

    // Test property key with dots
    public void test_get_propertyKeyWithDots() {
        String dottedKey = "deeply.nested.property.key";
        String dottedValue = "nested-value";

   */
  private InternetDomainName ancestor(int levels) {
    ImmutableList<String> ancestorParts = parts.subList(levels, parts.size());

    // levels equals the number of dots that are getting clipped away, then add the length of each
    // clipped part to get the length of the leading substring that is being removed.
    int substringFrom = levels;
    for (int i = 0; i < levels; i++) {

This release also stabilizes many APIs in the `mockwebserver3` artifact that's new in 5.0.

 *  Breaking: `RecordedRequest.body` is now nullable. Null is used when the request does not have a
    body.

 *  Breaking: `RecordedRequest.chunkSizes` is now nullable. Null is used when the request does not
    use chunked encoding. This is different from an empty list - that indicates the request is
    chunked but has no data.

        with:
          python-version: 3.x

      - run: pip install mkdocs-material mkdocs-redirects

      - name: Generate Docs
        run: ./test_docs.sh

      - uses: actions/upload-artifact@v4
        with:
          name: docs

-->
```release-note

```

#### Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

<!--
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KEPs or supporting documentation, please reference a specific commit and avoid

                .put("one", "uno", 1)
                .put("two", "dos", 6)
                .put("three", "tres", 3)
                .buildOrThrow(),
            immutableCell("one", "uno", 1),
            immutableCell("two", "dos", 2),
            immutableCell("three", "tres", 3),
            immutableCell("two", "dos", 4));
  }

            <parameters>true</parameters>
            <compilerArgs combine.children="override">
              <!-- https://errorprone.info/docs/installation#maven -->
              <arg>-XDcompilePolicy=simple</arg>
              <arg>--should-stop=ifError=FLOW</arg>

              <!-- https://errorprone.info/docs/installation#maven -->
              <!-- TODO(cpovirk): Enable NullArgumentForNonNullParameter for