assertTrue(range.containsAll(ImmutableSortedSet.<Integer>of()));
    assertFalse(range.containsAll(ImmutableSortedSet.of(3, 3, 4, 5, 6)));

    assertTrue(Range.openClosed(3, 3).containsAll(Collections.<Integer>emptySet()));
  }

  public void testEncloses_open() {
    Range<Integer> range = Range.open(2, 5);
    assertTrue(range.encloses(range));
    assertTrue(range.encloses(Range.open(2, 4)));

          result = TreeSet(String.CASE_INSENSITIVE_ORDER)
        }
        for (varyField in value.split(',')) {
          result.add(varyField.trim())
        }
      }
      return result ?: emptySet()
    }

    /**
     * Returns the subset of the headers in this's request that impact the content of this's body.
     */
    fun Response.varyHeaders(): Headers {

  }

  public TesterRequirements(TesterRequirements tr) {
    this(tr.getPresentFeatures(), tr.getAbsentFeatures());
  }

  public TesterRequirements() {
    this(Collections.emptySet(), Collections.emptySet());
  }

  public final Set<Feature<?>> getPresentFeatures() {
    return presentFeatures;
  }

  public final Set<Feature<?>> getAbsentFeatures() {
    return absentFeatures;
  }

        result.add(internalScopeManager.createResolutionScope(
                RS_NONE,
                InternalScopeManager.Mode.REMOVE,
                Collections.emptySet(),
                Collections.emptySet(),
                allDependencyScopes));
        result.add(internalScopeManager.createResolutionScope(
                RS_MAIN_COMPILE,
                InternalScopeManager.Mode.ELIMINATE,

  }

  public TesterRequirements(TesterRequirements tr) {
    this(tr.getPresentFeatures(), tr.getAbsentFeatures());
  }

  public TesterRequirements() {
    this(Collections.emptySet(), Collections.emptySet());
  }

  public final Set<Feature<?>> getPresentFeatures() {
    return presentFeatures;
  }

  public final Set<Feature<?>> getAbsentFeatures() {
    return absentFeatures;
  }

        result.add(internalScopeManager.createResolutionScope(
                RS_NONE,
                InternalScopeManager.Mode.REMOVE,
                Collections.emptySet(),
                Collections.emptySet(),
                allDependencyScopes));
        result.add(internalScopeManager.createResolutionScope(
                RS_MAIN_COMPILE,
                InternalScopeManager.Mode.ELIMINATE,

 *
 * @author Hayward Chan
 */
final class RegularImmutableSet<E> extends ForwardingImmutableSet<E> {
  static final RegularImmutableSet<Object> EMPTY =
      new RegularImmutableSet<Object>(Collections.emptySet());

  RegularImmutableSet(Set<E> delegate) {
    super(delegate);
  }

import static com.google.common.collect.testing.ReflectionFreeAssertThrows.assertThrows;
import static java.util.Arrays.asList;
import static java.util.Collections.emptyMap;
import static java.util.Collections.emptySet;
import static java.util.Collections.singleton;
import static java.util.Collections.singletonMap;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.J2ktIncompatible;

   */
  public static <E> Collector<E, ?, ImmutableSet<E>> toImmutableSet() {
    return CollectCollectors.toImmutableSet();
  }

  /**
   * Returns the empty immutable set. Preferred over {@link Collections#emptySet} for code
   * consistency, and because the return type conveys the immutability guarantee.
   *
   * <p><b>Performance note:</b> the instance returned is a singleton.
   */

  }

  @Override
  public @Nullable T orNull() {
    return null;
  }

  @Override
  public Set<T> asSet() {
    return Collections.emptySet();
  }

  @Override
  public <V> Optional<V> transform(Function<? super T, V> function) {
    checkNotNull(function);
    return Optional.absent();
  }

  @Override