// If it's an Entry, it may become invalid once it's removed from the Map. Copy it.
    if (element instanceof Entry) {
      Entry<?, ?> entry = (Entry<?, ?>) element;
      element = mapEntry(entry.getKey(), entry.getValue());
    }
    assertTrue(collection.contains(element)); // sanity check
    iterator.remove();
    assertFalse(collection.contains(element));
    assertEquals(originalSize - 1, collection.size());

    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);
                    }

                requireNonNull(e2);
                return comparator.compare(e1.getKey(), e2.getKey());
              });
          // requireNonNull is safe because the first `size` elements have been filled in.
          Entry<K, V> firstEntry = requireNonNull(entryArray[0]);
          K prevKey = firstEntry.getKey();
          keys[0] = prevKey;
          values[0] = firstEntry.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);

    // If it's an Entry, it may become invalid once it's removed from the Map. Copy it.
    if (element instanceof Entry) {
      Entry<?, ?> entry = (Entry<?, ?>) element;
      element = mapEntry(entry.getKey(), entry.getValue());
    }
    assertTrue(collection.contains(element)); // sanity check
    iterator.remove();
    assertFalse(collection.contains(element));
    assertEquals(originalSize - 1, collection.size());

                    ListMultimap<String, String> multimap = ArrayListMultimap.create();
                    for (Entry<String, String> entry : entries) {
                      multimap.put(entry.getKey(), entry.getValue());
                    }
                    return multimap;
                  }
                })
            .named("ArrayListMultimap")
            .withFeatures(

  public void testAsMapGet() {
    for (K key : sampleKeys()) {
      List<V> expectedValues = new ArrayList<>();
      for (Entry<K, V> entry : getSampleElements()) {
        if (entry.getKey().equals(key)) {
          expectedValues.add(entry.getValue());
        }
      }

      Collection<V> collection = multimap().asMap().get(key);
      if (expectedValues.isEmpty()) {
        assertNull(collection);