* gets invoked from other immutable collections.
   */
  public void testDoesntCheckForNull() {
    ImmutableSet<Integer> set = ImmutableSet.of(1, 2, 3);
    ImmutableList<Integer> unused =
        new RegularImmutableAsList<Integer>(set, new @Nullable Object[] {null, null, null});
    // shouldn't throw!
  }

  static <T> T[] clone(T[] array) {
    return array.clone();
  }

  // Class.cast is not supported in GWT.  This method is a no-op in GWT.
  static void checkCast(Class<?> clazz, Object obj) {
    Object unused = clazz.cast(obj);
  }

  @FormatMethod
  static String format(String template, Object... args) {
    return String.format(Locale.ROOT, template, args);
  }

  private Platform() {}

  static <T> T[] clone(T[] array) {
    return array.clone();
  }

  // Class.cast is not supported in GWT.  This method is a no-op in GWT.
  static void checkCast(Class<?> clazz, Object obj) {
    Object unused = clazz.cast(obj);
  }

  @FormatMethod
  static String format(String template, Object... args) {
    return String.format(Locale.ROOT, template, args);
  }

  private Platform() {}

        QueryOp.create(
            "Map.get",
            (map, key) -> {
              Object unused = map.get(key);
            },
            Math::log);

    static final QueryOp<Set<Object>> SET_CONTAINS =
        QueryOp.create(
            "Set.contains",
            (set, key) -> {
              boolean unused = set.contains(key);
            },
            Math::log);

    testComparator(comparator, empty, z, abc);

    // Just demonstrate that no explicit type parameter is required
    Comparator<Optional<String>> unused = emptiesFirst(naturalOrder());
  }

  public void testEmptiesLast() {
    Optional<String> empty = Optional.empty();
    Optional<String> abc = Optional.of("abc");
    Optional<String> z = Optional.of("z");

 * limitations under the License.
 */

package com.google.common.testing.anotherpackage;

/** Does not check null, but should not matter since it's in a different package. */
@SuppressWarnings("unused") // For use by NullPointerTester
public class SomeClassThatDoesNotUseNullable {

  void packagePrivateButDoesNotCheckNull(String s) {}

  protected void protectedButDoesNotCheckNull(String s) {}

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;

/**
 * Unused stub class, unreferenced under Java and manually emulated under GWT.
 *
 * @author Chris Povirk
 */
@GwtCompatible
abstract class ForwardingImmutableList<E> {
  private ForwardingImmutableList() {}

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;

/**
 * Unused stub class, unreferenced under Java and manually emulated under GWT.
 *
 * @author Chris Povirk
 */
@GwtCompatible
abstract class ForwardingImmutableSet<E> {
  private ForwardingImmutableSet() {}

    FakeTicker ticker = new FakeTicker().setAutoIncrementStep(incrementByNanos, NANOSECONDS);

    int numberOfThreads = 64;
    runConcurrentTest(
        numberOfThreads,
        () -> {
          long unused = ticker.read();
          return null;
        });

    assertEquals(incrementByNanos * numberOfThreads, ticker.read());
  }

  /** Runs {@code callable} concurrently {@code numberOfThreads} times. */

        assertThrows(ArrayIndexOutOfBoundsException.class, () -> {
            @SuppressWarnings("unused")
            String s = msgs[-1];
        });

        // Act & Assert: index equal to length
        assertThrows(ArrayIndexOutOfBoundsException.class, () -> {
            @SuppressWarnings("unused")
            String s = msgs[msgs.length];
        });
    }

    @Test