OutputStream getOutputStream();

    @Nullable
    Writer getWriter();

    @Nonnull
    T getContent();

    @Nullable
    Function<Object, String> getInputLocationFormatter();

    static <T> XmlWriterRequestBuilder<T> builder() {
        return new XmlWriterRequestBuilder<>();
    }

    class XmlWriterRequestBuilder<T> {
        Path path;
        OutputStream outputStream;
        Writer writer;

}
```

## 🏗️ Architecture & Design Patterns

### Core Design Principles
CoreLib follows a **utility-class pattern** where most functionality is exposed through static methods:

- **Assertion-based validation** - All methods validate inputs using `AssertionUtil.assertArgumentNotNull()` and `AssertionUtil.assertArgumentNotEmpty()`

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

public class EnableVersioning {
  /** MinioClient.enableVersioning() example. */
  public static void main(String[] args)
      throws IOException, NoSuchAlgorithmException, InvalidKeyException {
    try {
      /* play.min.io for test and development. */
      MinioClient minioClient =

    protected static final Class<?> suppressUnusedImportLocalDateTime = LocalDateTime.class;

    // ===================================================================================
    //                                                                           Singleton
    //                                                                           =========

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.api.admin.accesstoken;

import static org.codelibs.core.stream.StreamUtil.stream;
import static org.codelibs.fess.app.web.admin.accesstoken.AdminAccesstokenAction.getAccessToken;

import java.util.List;
import java.util.stream.Collectors;

import org.apache.logging.log4j.LogManager;

    protected static final Class<?> suppressUnusedImportLocalDateTime = LocalDateTime.class;

    // ===================================================================================
    //                                                                           Singleton
    //                                                                           =========
    private static final ClickLogDbm _instance = new ClickLogDbm();

    attributes:
      label: (Optional) What would the method signatures for your feature look like?
      placeholder: |
        e.g.,
        public static <E> ImmutableList<E> of();
        public static <E> ImmutableList<E> of(E element);
        public static <E> ImmutableList<E> of(E e1, E e2);
        ...
      render: java
    validations:
      required: false

  - type: markdown
    attributes:

 */
public class DuplicateHostPager implements Serializable {

    private static final long serialVersionUID = 1L;

    /** Default page size for pagination. */
    public static final int DEFAULT_PAGE_SIZE = 20;

    /** Default current page number (first page). */
    public static final int DEFAULT_CURRENT_PAGE_NUMBER = 1;

    /** Total number of records across all pages. */

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.api.admin.webconfig;

import static org.codelibs.core.stream.StreamUtil.stream;
import static org.codelibs.fess.app.web.admin.webconfig.AdminWebconfigAction.getWebConfig;

import java.util.List;
import java.util.stream.Collectors;

import org.apache.logging.log4j.LogManager;

    protected static final Class<?> suppressUnusedImportLocalDateTime = LocalDateTime.class;

    // ===================================================================================
    //                                                                           Singleton
    //                                                                           =========