// Empty multimaps *do* have defined equals semantics.
  @SuppressWarnings("UndefinedEquals")
  public void testPutAllIntoEmpty() {
    Multimap<K, V> target = getSubjectGenerator().create();
    assertEquals(!multimap().isEmpty(), target.putAll(multimap()));
    assertEquals(multimap(), target);
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutAll() {
    Multimap<K, V> source =

      ImmutableCollection<? extends ListenableFuture<? extends V>> futures,
      boolean allMustSucceed) {
    super(futures, allMustSucceed, true);

    List<@Nullable Present<V>> values =
        futures.isEmpty()
            ? Collections.<@Nullable Present<V>>emptyList()
            : Lists.<@Nullable Present<V>>newArrayListWithCapacity(futures.size());

    // Populate the results list with null initially.

    transient @Nullable SortedMap<C, V> wholeRow;

    // If the row was previously empty, we check if there's a new row here every time we're queried.
    void updateWholeRowField() {
      if (wholeRow == null || (wholeRow.isEmpty() && backingMap.containsKey(rowKey))) {
        wholeRow = (SortedMap<C, V>) backingMap.get(rowKey);
      }
    }

    @Override
    @Nullable SortedMap<C, V> computeBackingRowMap() {

    }

    @Override
    public int hashCode() {
        return getProperties().hashCode();
    }

    @Override
    public boolean isEmpty() {
        return getProperties().isEmpty();
    }

    @Override
    public Enumeration<Object> keys() {
        return getProperties().keys();
    }

    @Override
    public Set<Object> keySet() {

      "Unexpected trust managers: ${result.contentToString()}"
    }

    val trustManager = result[0] as X509TrustManager

    return when {
      insecureHosts.isEmpty() -> trustManager
      Platform.isAndroid -> InsecureAndroidTrustManager(trustManager, insecureHosts)
      else -> InsecureExtendedTrustManager(trustManager as X509ExtendedTrustManager, insecureHosts)
    }
  }

  /**

        
        synchronized (pendingNotifications) {
            while (!pendingNotifications.isEmpty() && batch.size() < batchSize) {
                batch.add(pendingNotifications.poll());
            }
        }
        
        if (!batch.isEmpty()) {
            processNotificationBatch(batch);
        }
    }
    

                avgThreadTimeMs);

        // Verify performance improvements
        assertTrue(exceptions.isEmpty(), "No exceptions should occur during concurrent access");
        assertEquals(threadCount * operationsPerThread, successCount.get());

        List<Expression> expressions = documentation.getExpressions();

        Map<String, Expression> bySyntax = new HashMap<>();

        if (expressions != null && !expressions.isEmpty()) {
            for (Expression expression : expressions) {
                bySyntax.put(expression.getSyntax(), expression);
            }
        }

        return bySyntax;
    }

    List<String> transformedList = transform(SOME_LIST, SOME_FUNCTION);
    assertFalse(transformedList.isEmpty());
  }

  public void testTransformSequentialIsNotEmpty() {
    List<String> transformedList = transform(SOME_SEQUENTIAL_LIST, SOME_FUNCTION);
    assertFalse(transformedList.isEmpty());
  }

  public void testTransformListIteratorRandomAccess() {

  }

  /** Test how [HttpUrl] does against the web platform test suite.  */
  @ArgumentsSource(TestDataParamProvider::class)
  @ParameterizedTest
  fun httpUrl(testData: WebPlatformUrlTestData) {
    if (!testData.scheme.isEmpty() && !HTTP_URL_SCHEMES.contains(testData.scheme)) {
      System.err.println("Ignoring unsupported scheme ${testData.scheme}")
      return
    }

    if (!testData.base!!.startsWith("https:") &&