@GwtCompatible
@ElementTypesAreNonnullByDefault
final class Present<T> extends Optional<T> {
  private final T reference;

  Present(T reference) {
    this.reference = reference;
  }

  @Override
  public boolean isPresent() {
    return true;
  }

  @Override
  public T get() {
    return reference;
  }

  @Override
  public T or(T defaultValue) {

    state = State.DONE;
    return null;
  }

  @Override
  public final boolean hasNext() {
    checkState(state != State.FAILED);
    switch (state) {
      case DONE:
        return false;
      case READY:
        return true;
      default:
    }
    return tryToComputeNext();
  }

  private boolean tryToComputeNext() {
    state = State.FAILED; // temporary pessimism
    next = computeNext();

        super(capacity);
    }

    /**
     * キーが含まれているかどうかを返します。
     *
     * @param key
     *            キー
     * @return キーが含まれているかどうか
     */
    public boolean containsKey(final String key) {
        return super.containsKey(convertKey(key));
    }

    @Override
    public V get(final Object key) {
        return super.get(convertKey(key));
    }

    @Override

     *
     * @param version the version to test, must not be {@code null}
     * @return {@code true} if this range contains the specified version, {@code false} otherwise
     */
    boolean contains(@Nonnull Version version);

    /**
     * Returns the upper boundary of this range, or {@code null} if none.
     */
    @Nullable
    Boundary getUpperBoundary();

    /**

            String groupId,
            String artifactId,
            VersionRange versionRange,
            String type,
            String classifier,
            String scope,
            boolean optional);

    Artifact createDependencyArtifact(
            String groupId,
            String artifactId,
            VersionRange versionRange,
            String type,
            String classifier,

   * @return {@code true} if the method increased the size of the multimap, or {@code false} if the
   *     multimap already contained the key-value pair
   */
  @CanIgnoreReturnValue
  @Override
  public boolean put(@ParametricNullness K key, @ParametricNullness V value) {
    return super.put(key, value);
  }

  /**
   * Compares the specified object to this multimap for equality.
   *

    //                                                                         ===========
    @Override
    public boolean hasPrimaryKey() {
        return false;
    }

    @Override
    public boolean hasCompoundPrimaryKey() {
        return false;
    }

    @Override
    protected UniqueInfo cpui() {
        return null;
    }

    // No TLS extensions if the socket class is custom.
    socketAdapters.find { it.matchesSocket(sslSocket) }?.getSelectedProtocol(sslSocket)

  override fun isCleartextTrafficPermitted(hostname: String): Boolean =
    when {
      Build.VERSION.SDK_INT >= 24 -> NetworkSecurityPolicy.getInstance().isCleartextTrafficPermitted(hostname)
      Build.VERSION.SDK_INT >= 23 -> NetworkSecurityPolicy.getInstance().isCleartextTrafficPermitted

  private class AlpnProvider(
    /** This peer's supported protocols. */
    private val protocols: List<String>,
  ) : InvocationHandler {
    /** Set when remote peer notifies ALPN is unsupported. */
    var unsupported: Boolean = false

    /** The protocol the server selected. */
    var selected: String? = null

    @Throws(Throwable::class)
    override fun invoke(
      proxy: Any,
      method: Method,
      args: Array<Any>?,

   * @return {@code true} if the method increased the size of the multimap, or {@code false} if the
   *     multimap already contained the key-value pair
   */
  @CanIgnoreReturnValue
  @Override
  public boolean put(@ParametricNullness K key, @ParametricNullness V value) {
    return super.put(key, value);
  }

  /**
   * Compares the specified object to this multimap for equality.
   *