*/
  public static <E extends Comparable<E>> MinMaxPriorityQueue<E> create() {
    return new Builder<Comparable<E>>(Ordering.natural()).create();
  }

  /**
   * Creates a new min-max priority queue using natural order, no maximum size, and initially
   * containing the given elements.
   */
  public static <E extends Comparable<E>> MinMaxPriorityQueue<E> create(

   * ascending order.
   *
   * @throws IllegalArgumentException if {@code k < 0} or {@code k > Integer.MAX_VALUE / 2}
   */
  public static <T extends Comparable<? super T>> TopKSelector<T> least(int k) {
    return least(k, Ordering.natural());
  }

  /**
   * Returns a {@code TopKSelector} that collects the lowest {@code k} elements added to it,

import java.io.Serializable;

@GwtCompatible(emulated = true)
@SuppressWarnings("rawtypes") // https://github.com/google/guava/issues/989
abstract class RangeGwtSerializationDependencies<C extends Comparable> implements Serializable {
  C dummy;

   *
   * @throws NullPointerException if any element in the input is null
   * @since 21.0
   */
  public static <E extends Comparable<? super E>> ImmutableList<E> sortedCopyOf(
      Iterable<? extends E> elements) {
    Comparable<?>[] array = Iterables.toArray(elements, new Comparable<?>[0]);
    checkElementsNotNull((Object[]) array);
    Arrays.sort(array);
    return asImmutableList(array);
  }

  /**

import com.google.common.annotations.GwtCompatible;
import java.io.Serializable;
import java.util.Arrays;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A class that implements {@code Comparable} without generics, such as those found in libraries
 * that support Java 1.4 and before. Our library needs to do the bare minimum to accommodate such

    assertLessThan(RUNNING, STOPPING);
    assertLessThan(RUNNING, FAILED);

    assertLessThan(STOPPING, FAILED);
    assertLessThan(STOPPING, TERMINATED);
  }

  private static <T extends Comparable<? super T>> void assertLessThan(T a, T b) {
    if (a.compareTo(b) >= 0) {
      fail(String.format(Locale.ROOT, "Expected %s to be less than %s", a, b));
    }
  }

 *
 * @author Gregory Kick
 * @since 10.0
 */
@GwtCompatible(emulated = true)
@SuppressWarnings("rawtypes") // allow ungenerified Comparable types
@ElementTypesAreNonnullByDefault
public abstract class ContiguousSet<C extends Comparable> extends ImmutableSortedSet<C> {
  /**
   * Returns a {@code ContiguousSet} containing the same values in the given domain {@linkplain
   * Range#contains contained} by the range.

 *
 * @author Louis Wasserman
 */
@SuppressWarnings("rawtypes") // https://github.com/google/guava/issues/989
@GwtIncompatible
@ElementTypesAreNonnullByDefault
abstract class AbstractRangeSet<C extends Comparable> implements RangeSet<C> {
  AbstractRangeSet() {}

  @Override
  public boolean contains(C value) {
    return rangeContaining(value) != null;
  }

  @Override
  @CheckForNull

    assertLessThan(RUNNING, STOPPING);
    assertLessThan(RUNNING, FAILED);

    assertLessThan(STOPPING, FAILED);
    assertLessThan(STOPPING, TERMINATED);
  }

  private static <T extends Comparable<? super T>> void assertLessThan(T a, T b) {
    if (a.compareTo(b) >= 0) {
      fail(String.format(Locale.ROOT, "Expected %s to be less than %s", a, b));
    }
  }

      extends TestStringSetGenerator {

    private static final Comparator<Comparable<?>> COMPARABLE_REVERSED = Collections.reverseOrder();

    @Override
    protected SortedSet<String> create(String[] elements) {
      return new ImmutableSortedSet.Builder<String>(COMPARABLE_REVERSED).add(elements).build();
    }

    @Override
    public List<String> order(List<String> insertionOrder) {