* javadoc for details.
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class CommonPattern {
  public abstract CommonMatcher matcher(CharSequence t);

  public abstract String pattern();

  public abstract int flags();

  // Re-declare this as abstract to force subclasses to override.
  @Override
  public abstract String toString();

 * javadoc for details.
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
abstract class CommonPattern {
  public abstract CommonMatcher matcher(CharSequence t);

  public abstract String pattern();

  public abstract int flags();

  // Re-declare this as abstract to force subclasses to override.
  @Override
  public abstract String toString();

  }

  /**
   * This method returns a {@code ImmutableSortedMap}, consisting of the entries whose keys ranges
   * from {@code fromKey} to {@code toKey}, inclusive or exclusive as indicated by the boolean
   * flags.
   *
   * <p>The {@link SortedMap#subMap} documentation states that a submap of a submap throws an {@link
   * IllegalArgumentException} if passed a {@code fromKey} less than an earlier {@code fromKey}.

  }

  @Override
  public String pattern() {
    return pattern.pattern();
  }

  @Override
  public int flags() {
    return pattern.flags();
  }

  @Override
  public String toString() {
    return pattern.toString();
  }

  private static final class JdkMatcher extends CommonMatcher {
    final Matcher matcher;

    JdkMatcher(Matcher matcher) {

  }

  @Override
  public String pattern() {
    return pattern.pattern();
  }

  @Override
  public int flags() {
    return pattern.flags();
  }

  @Override
  public String toString() {
    return pattern.toString();
  }

  private static final class JdkMatcher extends CommonMatcher {
    final Matcher matcher;

    JdkMatcher(Matcher matcher) {

      checkArgument(
          (flags >= 0) && (flags <= 0xffff),
          "flags '%s' is out of range (0 <= flags <= 0xffff)",
          flags);

      this.server = MoreObjects.firstNonNull(server, ANY4);
      this.client = MoreObjects.firstNonNull(client, ANY4);
      this.port = port;
      this.flags = flags;
    }

    public Inet4Address getServer() {
      return server;
    }

    assertThrows(IllegalArgumentException.class, () -> InetAddresses.forUriString(""));

    assertThrows(
        IllegalArgumentException.class, () -> InetAddresses.forUriString("192.168.999.888"));

    assertThrows(
        IllegalArgumentException.class, () -> InetAddresses.forUriString("www.google.com"));

    assertThrows(IllegalArgumentException.class, () -> InetAddresses.forUriString("[1:2e]"));

   * (is a subtype of) {@code clazz}. Example:
   *
   * <pre>{@code
   * List<Class<?>> classes = Arrays.asList(
   *     Object.class, String.class, Number.class, Long.class);
   * return Iterables.filter(classes, subtypeOf(Number.class));
   * }</pre>
   *
   * The code above returns an iterable containing {@code Number.class} and {@code Long.class}.
   *

            Interface12.class,
            Interface1.class,
            Interface2.class,
            Class1.class,
            Object.class);
    makeUnmodifiable(types.interfaces().rawTypes())
        .containsExactly(
            Interface3.class,
            Interface12.class,
            Interface1.class,
            Interface2.class,
            Iterable.class);
    makeUnmodifiable(types.classes().rawTypes())

    assertBadUseOfReferentialEquality(SameIntegerInstance.class);
    assertBadUseOfReferentialEquality(SameLongInstance.class);
    assertBadUseOfReferentialEquality(SameFloatInstance.class);
    assertBadUseOfReferentialEquality(SameDoubleInstance.class);
    assertBadUseOfReferentialEquality(SameShortInstance.class);
    assertBadUseOfReferentialEquality(SameByteInstance.class);
    assertBadUseOfReferentialEquality(SameCharacterInstance.class);