}

    @CanIgnoreReturnValue // Sure, why not?
    @Override
    public T apply(T key) {
      awaitUninterruptibly(delayLatch);
      return key;
    }
  }

  /*
   * TODO(cpovirk): eliminate duplication between these tests and those in LegacyMapMakerTests and
   * anywhere else
   */

  public void testInitialCapacity_negative() {
    MapMaker maker = new MapMaker();

Додаткові допоміжні функції `fake_password_hasher` і `fake_save_user` лише демонструють можливий потік даних і, звісно, не забезпечують реальної безпеки.

///

## Зменшення дублювання { #reduce-duplication }

Зменшення дублювання коду - одна з ключових ідей у **FastAPI**.

Адже дублювання коду підвищує ймовірність помилок, проблем безпеки, розсинхронізації коду (коли ви оновлюєте в одному місці, але не в інших) тощо.

    inverseFeatures.remove(CollectionFeature.KNOWN_ORDER);
    inverseFeatures.add(MapFeature.REJECTS_DUPLICATES_AT_CREATION);

    return inverseFeatures;
  }

  // TODO(lowasser): can we eliminate the duplication from MapTestSuiteBuilder here?

  private static Set<Feature<?>> computeValuesSetFeatures(Set<Feature<?>> mapFeatures) {
    Set<Feature<?>> valuesCollectionFeatures = computeCommonDerivedCollectionFeatures(mapFeatures);

import static eu.maveniverse.domtrip.maven.MavenPomElements.Elements.PARENT;

/**
 * Abstract base class for upgrade strategies that provides common functionality
 * and reduces code duplication across strategy implementations.
 *
 * <p>Strategies work with domtrip Documents for perfect formatting preservation.
 * Subclasses can create domtrip Editors from Documents as needed:
 * <pre>

 *     list of available routes.
 *
 * If the pool gains an eligible connection while DNS, TCP, or TLS work is in flight, this finder
 * will prefer pooled connections. Only pooled HTTP/2 connections are used for such de-duplication.
 *
 * It is possible to cancel the finding process by canceling its call.
 *
 * Implementations of this interface are not thread-safe. Each instance is thread-confined to the
 * thread executing the call.
 */

    inverseFeatures.remove(CollectionFeature.KNOWN_ORDER);
    inverseFeatures.add(MapFeature.REJECTS_DUPLICATES_AT_CREATION);

    return inverseFeatures;
  }

  // TODO(lowasser): can we eliminate the duplication from MapTestSuiteBuilder here?

  private static Set<Feature<?>> computeValuesSetFeatures(Set<Feature<?>> mapFeatures) {
    Set<Feature<?>> valuesCollectionFeatures = computeCommonDerivedCollectionFeatures(mapFeatures);

import java.util.Collections;
import java.util.Map;

import org.codelibs.core.lang.StringUtil;

/**
 * Utility class for loading JSON resource files for settings.
 * Centralizes resource loading logic to reduce code duplication across settings classes.
 *
 * <p>This class provides methods to load JSON resources from the classpath with optional
 * placeholder substitution.
 */
public final class SettingsResourceLoader {

Ainsi, j'ai pu trouver les meilleurs moyens de réduire autant que possible la duplication du code, d'avoir l'autocomplétion partout, les contrôles de type et d'erreur, etc.

Le tout de manière à offrir la meilleure expérience de développement à tous les développeurs.

## Exigences { #requirements }

import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

/**
 * Utility class for creating test fixtures and reducing code duplication in tests.
 */
public final class TestUtils {

    private TestUtils() {
        // Utility class
    }

    /**
     * Creates a mock UpgradeContext with default settings.
     *

     * 2. Check if field is a search field and apply field-specific query
     * 3. Fall back to default query builder for unsupported fields
     *
     * This reduces code duplication across query command implementations.
     *
     * @param fessConfig the Fess configuration
     * @param context the query context
     * @param field the field name
     * @param text the query text