*/
@GwtCompatible
@NullMarked
public class MinimalCollection<E extends @Nullable Object> extends AbstractCollection<E> {
  // TODO: expose allow nulls parameter?

  public static <E extends @Nullable Object> MinimalCollection<E> of(E... contents) {
    return new MinimalCollection<>(Object.class, true, contents);
  }

  // TODO: use this
  public static <E extends @Nullable Object> MinimalCollection<E> ofClassAndContents(

 */
@GwtCompatible
@NullMarked
public class MinimalCollection<E extends @Nullable Object> extends AbstractCollection<E> {
  // TODO: expose allow nulls parameter?

  public static <E extends @Nullable Object> MinimalCollection<E> of(E... contents) {
    return new MinimalCollection<>(Object.class, true, contents);
  }

  // TODO: use this
  public static <E extends @Nullable Object> MinimalCollection<E> ofClassAndContents(

            return SearchResult.create().build();
        }
    }

    /**
     * Extended searcher for testing inheritance.
     */
    static class ExtendedTestSearcher extends TestSearcher {
        @Override
        protected SearchResult search(String query, SearchRequestParams params, OptionalThing<FessUserBean> userBean) {

...e ter o código para os testes como antes.

## Testando: exemplo estendido { #testing-extended-example }

Agora vamos estender este exemplo e adicionar mais detalhes para ver como testar diferentes partes.

### Arquivo de aplicação **FastAPI** estendido { #extended-fastapi-app-file }

Vamos continuar com a mesma estrutura de arquivo de antes:

```
.
├── app
│   ├── __init__.py

/// tip | Consejo

Este es un punto de extensión de bajo nivel.

Si solo necesitas declarar responses adicionales, una forma más conveniente de hacerlo es con [Responses Adicionales en OpenAPI](additional-responses.md).

///

Puedes extender el esquema de OpenAPI para una *path operation* usando el parámetro `openapi_extra`.

- Use `OptionalEntity<T>` for nullable returns
- Plain classes (no extends/implements)

### Helper
- Stateless utility classes
- Access via `ComponentUtil.getXyzHelper()`
- Named with "Helper" suffix

### DBFlute Generated Code
```
opensearch/{index}/
├── bsentity/, bsbhv/    # Base classes (DO NOT EDIT)
├── exentity/, exbhv/    # Extended classes (customize here)

 * <td>=
 * <td>Human-readable; no possibility of mixing up 0/O or 1/I. Defaults to upper case.
 * <tr>
 * <td>{@link #base32Hex()}
 * <td>0-9 A-V
 * <td>1.60
 * <td>=
 * <td>"Numerical" base 32; extended from the traditional hex alphabet. Defaults to upper case.
 * <tr>
 * <td>{@link #base64()}
 * <td>A-Z a-z 0-9 + /
 * <td>1.33
 * <td>=
 * <td>
 * <tr>
 * <td>{@link #base64Url()}

public final class ListGenerators {

  private ListGenerators() {}

  public static class ImmutableListOfGenerator extends TestStringListGenerator {
    @Override
    protected List<String> create(String[] elements) {
      return ImmutableList.copyOf(elements);
    }
  }

  public static class BuilderAddListGenerator extends TestStringListGenerator {
    @Override
    protected List<String> create(String[] elements) {

  }

  private abstract class WithGenericBound<A> {

    @Keep
    public <B extends A> void withTypeVariable(List<B> list) {}

    @Keep
    public <E extends Enum<E>> void withRecursiveBound(List<E> list) {}

    @Keep
    public <K extends List<V>, V extends List<K>> void withMutualRecursiveBound(
        List<Map<K, V>> list) {}

    @Keep

  }

  private abstract class WithGenericBound<A> {

    @Keep
    public <B extends A> void withTypeVariable(List<B> list) {}

    @Keep
    public <E extends Enum<E>> void withRecursiveBound(List<E> list) {}

    @Keep
    public <K extends List<V>, V extends List<K>> void withMutualRecursiveBound(
        List<Map<K, V>> list) {}

    @Keep