}

  @Override
  abstract ImmutableSet<Cell<R, C, V>> createCellSet();

  @Override
  final UnmodifiableIterator<Cell<R, C, V>> cellIterator() {
    throw new AssertionError("should never be called");
  }

  @Override
  public ImmutableCollection<V> values() {
    return (ImmutableCollection<V>) super.values();
  }

  @Override
  abstract ImmutableCollection<V> createValues();

@DisableCachingByDefault(because = "This task starts a HTTP server and should not be cached.")
public abstract class ServeDocs extends DefaultTask {
    @InputFiles
    @PathSensitive(PathSensitivity.RELATIVE)
    protected abstract DirectoryProperty getDocsDirectory();

    @Input
    protected abstract Property<Integer> getPort();

    @Nested
    protected abstract Property<JavaLauncher> getJavaLauncher();

    @TaskAction

import java.util.List;
import java.util.Map.Entry;

/**
 * A skeleton generator for a {@code SetMultimap} implementation.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class TestStringSetMultimapGenerator
    implements TestSetMultimapGenerator<String, String> {

  @Override
  public SampleElements<Entry<String, String>> samples() {
    return new SampleElements<>(

    }

    /**
     * <code>abstract</code>かどうか返します。
     *
     * @param clazz
     *            クラス。{@literal null}であってはいけません
     * @return <code>abstract</code>なら{@literal true}
     */
    public static boolean isAbstract(final Class<?> clazz) {
        assertArgumentNotNull("clazz", clazz);

        return isAbstract(clazz.getModifiers());
    }

    /**

    return implied;
  }

  @Retention(RetentionPolicy.RUNTIME)
  @Inherited
  @TesterAnnotation
  public @interface Require {
    public abstract MapFeature[] value() default {};

    public abstract MapFeature[] absent() default {};
  }

@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public abstract class AbstractImmutableSetTest extends TestCase {

  protected abstract <E extends Comparable<? super E>> Set<E> of();

  protected abstract <E extends Comparable<? super E>> Set<E> of(E e);

  protected abstract <E extends Comparable<? super E>> Set<E> of(E e1, E e2);

  protected abstract <E extends Comparable<? super E>> Set<E> of(E e1, E e2, E e3);

@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
public abstract class AbstractImmutableSetTest extends TestCase {

  protected abstract <E extends Comparable<? super E>> Set<E> of();

  protected abstract <E extends Comparable<? super E>> Set<E> of(E e);

  protected abstract <E extends Comparable<? super E>> Set<E> of(E e1, E e2);

  protected abstract <E extends Comparable<? super E>> Set<E> of(E e1, E e2, E e3);

   */
  @Override
  public abstract boolean equals(@CheckForNull Object object);

  /**
   * Returns a hash code for this instance.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this class leaves the specific choice of
   * hash code unspecified, unlike the Java 8+ equivalent.
   */
  @Override
  public abstract int hashCode();

  /**

   * These methods perform most headSet, subSet, and tailSet logic, besides
   * parameter validation.
   */
  abstract ImmutableSortedSet<E> headSetImpl(E toElement, boolean inclusive);

  abstract ImmutableSortedSet<E> subSetImpl(
      E fromElement, boolean fromInclusive, E toElement, boolean toInclusive);

  abstract ImmutableSortedSet<E> tailSetImpl(E fromElement, boolean inclusive);

  /** @since 12.0 */

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