@Override
    public List<String> findVersions(Artifact artifact) {
        List<String> versions = getProjects()
                .getOrDefault(artifact.getGroupId(), Collections.emptyMap())
                .getOrDefault(artifact.getArtifactId(), Collections.emptyMap())
                .values()
                .stream()
                .map(MavenProject::getVersion)

    assertEquals(emptyMap(), map);
  }

  public void testConcurrentMap() {
    ConcurrentMap<Integer, Integer> map = Maps.newConcurrentMap();
    assertEquals(emptyMap(), map);
  }

  public void testTreeMap() {
    TreeMap<Integer, Integer> map = Maps.newTreeMap();
    assertEquals(emptyMap(), map);
    assertThat(map.comparator()).isNull();
  }

    assertEquals(emptyMap(), map);
  }

  public void testConcurrentMap() {
    ConcurrentMap<Integer, Integer> map = Maps.newConcurrentMap();
    assertEquals(emptyMap(), map);
  }

  public void testTreeMap() {
    TreeMap<Integer, Integer> map = Maps.newTreeMap();
    assertEquals(emptyMap(), map);
    assertThat(map.comparator()).isNull();
  }

     */
    protected volatile Map<String, Map<String, List<Tuple3<String, QueryBuilder, ScoreFunctionBuilder<?>>>>> keyMatchQueryMap =
            Collections.emptyMap();

    /**
     * Initializes the helper.
     * It loads KeyMatch settings from the database.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {

            new TestStringMapGenerator() {
              @Override
              protected Map<String, String> create(Entry<String, String>[] entries) {
                return emptyMap();
              }
            })
        .named("emptyMap")
        .withFeatures(CollectionFeature.SERIALIZABLE, CollectionSize.ZERO)
        .suppressing(suppressForEmptyMap())
        .createTestSuite();
  }

            if (blob == null) {
                return Collections.emptyMap();
            }
            // GCS uses metadata instead of tags
            final Map<String, String> metadata = blob.getMetadata();
            return metadata != null ? new HashMap<>(metadata) : Collections.emptyMap();
        } catch (final Exception e) {

     * (in lowercase), and the value is an array of related query strings.
     */
    protected volatile Map<String, Map<String, String[]>> relatedQueryMap = Collections.emptyMap();

    /**
     * Default constructor for RelatedQueryHelper.
     * Initializes the helper with an empty related query map.
     */
    public RelatedQueryHelper() {
        super();
    }

    /**

            }
            return null;
        }

        // Null-safety: use empty map if paramMap is null
        final Map<String, Object> safeParamMap = paramMap != null ? paramMap : Collections.emptyMap();

        // Prepare binding map with parameters and DI container
        final Map<String, Object> bindingMap = new HashMap<>(safeParamMap);
        bindingMap.put("container", SingletonLaContainerFactory.getContainer());

import static com.google.common.base.Preconditions.checkElementIndex;
import static com.google.common.base.Preconditions.checkNotNull;
import static java.lang.System.arraycopy;
import static java.util.Collections.emptyMap;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;

     * - Second: List of regex pattern matches (Pattern -> content template)
     */
    protected Map<String, Pair<Map<String, String>, List<Pair<Pattern, String>>>> relatedContentMap = Collections.emptyMap();

    /**
     * Prefix used to identify regex patterns in related content terms.
     * When a term starts with this prefix, it is treated as a regular expression
     * pattern rather than an exact match term.