log.trace("Domain " + entry.getKey());
            for (final Entry<String, CacheEntry<DfsReferralDataInternal>> entry2 : entry.getValue().entrySet()) {
                log.trace("  Root " + entry2.getKey());
                if (entry2.getValue().map != null) {

                        return new Entry<String, String>() {
                            @Override
                            public String getKey() {
                                return entry.getKey();
                            }

                            @Override
                            public String getValue() {
                                return entry.getValue();

                        return new Entry<String, String>() {
                            @Override
                            public String getKey() {
                                return entry.getKey();
                            }

                            @Override
                            public String getValue() {
                                return entry.getValue();

        // - Index size
        // - Memory usage
        // - System stats
        // etc.

        for (Map.Entry<String, Object> entry : res.entrySet()) {
            logger.info("Stats field: {} = {}", entry.getKey(), entry.getValue());
        }

        logger.info("[END] statsContentTest");
    }

    @Test
    void statsResponseFormatTest() {
        logger.info("[BEGIN] statsResponseFormatTest");

        // Extract artifact from all POMs in the project
        for (Map.Entry<Path, Document> entry : pomMap.entrySet()) {
            Path pomPath = entry.getKey();
            Document pomDocument = entry.getValue();

            Coordinates coordinate =
                    AbstractUpgradeStrategy.extractArtifactCoordinatesWithParentResolution(context, pomDocument);

            final StatsObject data = e.getValue();
            final Long begin = data.remove(BEGIN_KEY);
            if (begin != null) {
                printStats(e.getKey(), data, begin, false);
            }
        });

    }

    /**
     * Begins statistics tracking for the specified crawler object.
     * Creates a new statistics object in the cache and starts timing.

    assertNull("put(null, null) should return null", put(nullKeyValueEntry));
    expectAdded(nullKeyValueEntry);
  }

  @CanIgnoreReturnValue
  private V put(Entry<K, V> entry) {
    return getMap().put(entry.getKey(), entry.getValue());
  }

  /**
   * Returns the {@link Method} instance for {@link #testPut_nullKeyUnsupported()} so that tests of
   * {@link java.util.TreeMap} can suppress it with {@code

                                                                logger.debug("Skipping interpolation of field: " + field
                                                                        + " (key: " + entry.getKey() + ") in: "
                                                                        + cls.getName()
                                                                        + "; it is an unmodifiable collection.");

            if (phaseToGoalMapping != null) {
                for (Map.Entry<String, LifecyclePhase> goalsForLifecyclePhase : phaseToGoalMapping.entrySet()) {
                    String phase = goalsForLifecyclePhase.getKey();
                    LifecyclePhase goals = goalsForLifecyclePhase.getValue();
                    if (goals != null) {
                        parseLifecyclePhaseDefinitions(plugins, phase, goals);
                    }

  }

  private void putAll(Iterable<Entry<K, V>> entries) {
    Map<K, V> map = new LinkedHashMap<>();
    for (Entry<K, V> entry : entries) {
      map.put(entry.getKey(), entry.getValue());
    }
    getMap().putAll(map);
  }

  /**
   * Returns the {@link Method} instance for {@link #testPutAll_nullKeyUnsupported()} so that tests