*
     * @param <T> the element type
     * @param enumeration the enumeration (must not be {@literal null})
     * @return an {@link Iterable} wrapping the enumeration
     */
    public static <T> Iterable<T> iterable(final Enumeration<T> enumeration) {
        assertArgumentNotNull("enumeration", enumeration);

        return () -> new EnumerationIterator<>(enumeration);
    }

    /**

import org.junit.Test;

/**
 * @author koichik
 *
 */
public class ClassIteratorTest {

    /**
     * @throws Exception
     */
    @Test
    public void test() throws Exception {
        final ClassIterator it = new ClassIterator(Integer.class);
        assertThat(it.hasNext(), is(true));
        assertThat(it.next(), is(sameClass(Integer.class)));

        assertThat(it.hasNext(), is(true));

        values = result = Collections.unmodifiableCollection(delegate.values());
      }
      return result;
    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  private static final class UnmodifiableListMultimap<
          K extends @Nullable Object, V extends @Nullable Object>
      extends UnmodifiableMultimap<K, V> implements ListMultimap<K, V> {

        values = result = Collections.unmodifiableCollection(delegate.values());
      }
      return result;
    }

    @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;
  }

  private static final class UnmodifiableListMultimap<
          K extends @Nullable Object, V extends @Nullable Object>
      extends UnmodifiableMultimap<K, V> implements ListMultimap<K, V> {

              .withTearDown(parentBuilder.getTearDown())
              .createTestSuite());
    }
    return derivedSuites;
  }

  private static final class ReserializedListGenerator<E> implements TestListGenerator<E> {
    final OneSizeTestContainerGenerator<Collection<E>, E> gen;

    private ReserializedListGenerator(OneSizeTestContainerGenerator<Collection<E>, E> gen) {
      this.gen = gen;
    }

   * A-with-acute-accent, {@code Á} and {@code á}.
   */
  private static final String IGNORED = "`10-=~!@#$%^&*()_+[]\\{}|;':\",./<>?'\u00c1\u00e1\n";

  private static final String LOWER = "abcdefghijklmnopqrstuvwxyz";
  private static final String UPPER = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

  public void testToLowerCase() {
    assertEquals(LOWER, Ascii.toLowerCase(UPPER));

   * A-with-acute-accent, {@code Á} and {@code á}.
   */
  private static final String IGNORED = "`10-=~!@#$%^&*()_+[]\\{}|;':\",./<>?'\u00c1\u00e1\n";

  private static final String LOWER = "abcdefghijklmnopqrstuvwxyz";
  private static final String UPPER = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

  public void testToLowerCase() {
    assertEquals(LOWER, Ascii.toLowerCase(UPPER));

import org.jspecify.annotations.NullUnmarked;

/** Test Java8 map.compute in concurrent cache context. */
@NullUnmarked
public class LocalCacheMapComputeTest extends TestCase {
  final int count = 10000;
  final String delimiter = "-";
  final String key = "key";
  Cache<String, String> cache;

  // helper
  private static void doParallelCacheOp(int count, IntConsumer consumer) {

//
// The value is useful to stop processing early or when it is necessary to
// deliver a final empty token (which is different from a nil token).
// One could achieve the same behavior with a custom error value but
// providing one here is tidier.
// See the emptyFinalToken example for a use of this value.
var ErrFinalToken = errors.New("final token")

// Scan advances the [Scanner] to the next token, which will then be

        for (int t = 0; t < threadCount; t++) {
            final int threadId = t;
            executor.submit(() -> {
                try {
                    for (int i = 0; i < operationsPerThread; i++) {
                        try {
                            // Mix of success and failure
                            final int iteration = i;