throw new ExtractException(e);
            }
        }

        return encoding;
    }

    /**
     * Extracts text content from the given content by removing tags and processing attributes.
     * @param content The content to extract from.
     * @return The extracted text.
     */
    protected String extractString(final String content) {
        String input = content.replaceAll("[\\r\\n]", " ");

    public void setUp() throws Exception {
        super.setUp();
        ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
        validator = factory.getValidator();
    }

    // Test annotation attributes and defaults
    public void test_annotationAttributes() throws Exception {
        Field field = TestBean.class.getDeclaredField("cronExpression");
        CronExpression annotation = field.getAnnotation(CronExpression.class);

    void testGetAttributes() {
        // Default instance
        assertEquals(SmbConstants.ATTR_READONLY | SmbConstants.ATTR_DIRECTORY, shareInfo.getAttributes());

        // Instance with values - attributes are still constant
        SmbShareInfo info = new SmbShareInfo(TEST_NET_NAME, TEST_TYPE, TEST_REMARK);
        assertEquals(SmbConstants.ATTR_READONLY | SmbConstants.ATTR_DIRECTORY, info.getAttributes());
    }

We could do better.

We can declare a `UserBase` model that serves as a base for our other models. And then we can make subclasses of that model that inherit its attributes (type declarations, validation, etc).

All the data conversion, validation, documentation, etc. will still work as normally.

import okhttp3.internal.unmodifiable
import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement

/**
 * An [RFC 6265](http://tools.ietf.org/html/rfc6265) Cookie.
 *
 * This class doesn't support additional attributes on cookies, like
 * [Chromium's Priority=HIGH extension][chromium_extension].
 *
 * [chromium_extension]: https://code.google.com/p/chromium/issues/detail?id=232693
 */
@Suppress("NAME_SHADOWING")

/**
 * The SuggestItem class represents an item used for suggestions in the Fess search engine.
 * It contains various attributes such as text, readings, fields, tags, roles, languages, kinds, and frequencies.
 * The class provides methods to manipulate and retrieve these attributes, as well as to convert the item to and from different formats.
 */
public class SuggestItem {

    /**
     * The kind of suggest item.

 * parameter attributes or parameter values must be valid according to RFCs <a
 * href="https://tools.ietf.org/html/rfc2045">2045</a> and <a
 * href="https://tools.ietf.org/html/rfc2046">2046</a>.
 *
 * <p>All portions of the media type that are case-insensitive (type, subtype, parameter attributes)
 * are normalized to lowercase. The value of the {@code charset} parameter is normalized to

    protected String defaultField = null;

    /**
     * Constructs a new QueryContext with the specified query string.
     * Processes special query prefixes (allinurl:, allintitle:) and initializes
     * request-scoped attributes for highlighting and field logging.
     * @param queryString The query string to process.
     * @param isQuery Whether this is a search query (enables highlighting and logging).
     */
    @SuppressWarnings("unchecked")

            appendNode(children.item(i), buf);
        }
    }

    /**
     * Appends the string representation of a {@link NamedNodeMap}.
     *
     * @param attrs
     *            The attributes. Must not be {@literal null}.
     * @param buf
     *            The string buffer. Must not be {@literal null}.
     */
    public static void appendAttrs(final NamedNodeMap attrs, final StringBuilder buf) {

--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -423,4 +423,14 @@
 # endif
 #endif
 
+/* Undefine (also defined in libc-symbols.h).  */
+#undef __attribute_copy__
+#if __GNUC_PREREQ (9, 0)
+/* Copies attributes from the declaration or type referenced by
+   the argument.  */
+# define __attribute_copy__(arg) __attribute__ ((__copy__ (arg)))
+#else
+# define __attribute_copy__(arg)
+#endif
+