@SuppressWarnings("unchecked") // implementation is "fully variant"
  static <T> Optional<T> withType() {
    return (Optional<T>) INSTANCE;
  }

  private Absent() {}

  @Override
  public boolean isPresent() {
    return false;
  }

  @Override
  public T get() {
    throw new IllegalStateException("Optional.get() cannot be called on an absent value");
  }

  @Override
  public T or(T defaultValue) {

import com.google.common.collect.UnmodifiableIterator;
import java.util.AbstractSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import javax.annotation.CheckForNull;

/**
 * A class to represent the set of edges connecting an (implicit) origin node to a target node.
 *
 * <p>The {@link #outEdgeToNode} map allows this class to work on networks with parallel edges. See

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class MapContainsValueTester<K, V> extends AbstractMapTester<K, V> {
  @CollectionSize.Require(absent = ZERO)
  public void testContains_yes() {
    assertTrue("containsValue(present) should return true", getMap().containsValue(v0()));
  }

  public void testContains_no() {
    assertFalse("containsValue(notPresent) should return false", getMap().containsValue(v3()));
  }

    @Nonnull
    DependencyScope getScope();

    /**
     * Returns whether the dependency is optional or mandatory.
     * Contrarily to {@link DependencyCoordinates}, the obligation of a {@code Dependency} is always present.
     * The value is computed during the dependencies collection phase.
     *
     * @return {@code true} if the dependency is optional, or {@code false} if mandatory
     * @see DependencyCoordinates#getOptional()
     */

    }

    // DELETE /api/admin/duplicatehost/setting/{id}
    @Execute
    public JsonResponse<ApiResult> delete$setting(final String id) {
        duplicateHostService.getDuplicateHost(id).ifPresent(entity -> {
            try {
                duplicateHostService.delete(entity);
                saveInfo(messages -> messages.addSuccessCrudDeleteCrudTable(GLOBAL));
            } catch (final Exception e) {

                          && (m.getModifiers() & (PUBLIC | PROTECTED | PRIVATE)) == 0)
              .transform(Method::getDeclaringClass);
      if (!supersWithPackagePrivateWriteReplace.isPresent()) {
        continue;
      }
      assertWithMessage(
              "To help optimizers, any class that inherits a package-private writeReplace() method"
                  + " should override that method.\n"

        }
        final float importantContantLangBoost = fessConfig.getQueryBoostImportantContentLangAsDecimal().floatValue();
        getQueryLanguages().ifPresent(langs -> stream(langs).of(stream -> stream.forEach(lang -> {
            defaultQuery.add(
                    builder.apply(fessConfig.getIndexFieldTitle() + "_" + lang, fessConfig.getQueryBoostTitleLangAsDecimal().floatValue()));

        final LuceneQueryParser parser = new LuceneQueryParser(defaultField, analyzer);
        parser.setAllowLeadingWildcard(allowLeadingWildcard);
        LaRequestUtil.getOptionalRequest().ifPresent(req -> {
            if (req.getAttribute(Constants.DEFAULT_QUERY_OPERATOR) instanceof final String op) {
                parser.setDefaultOperator(Operator.valueOf(op));
            } else {

        + nodes()
        + ", edges: "
        + edgeIncidentNodesMap(this);
  }

  /**
   * Returns a {@link Set} whose methods throw {@link IllegalStateException} when the given edge is
   * not present in this network.
   *
   * @since 33.1.0
   */
  protected final <T> Set<T> edgeInvalidatableSet(Set<T> set, E edge) {
    return InvalidatableSet.of(

        + nodes()
        + ", edges: "
        + edgeIncidentNodesMap(this);
  }

  /**
   * Returns a {@link Set} whose methods throw {@link IllegalStateException} when the given edge is
   * not present in this network.
   *
   * @since 33.1.0
   */
  protected final <T> Set<T> edgeInvalidatableSet(Set<T> set, E edge) {
    return InvalidatableSet.of(