}
        ParameterizedType toParameterizedType = expectArgument(ParameterizedType.class, to);
        if (fromParameterizedType.getOwnerType() != null
            && toParameterizedType.getOwnerType() != null) {
          populateTypeMappings(
              mappings, fromParameterizedType.getOwnerType(), toParameterizedType.getOwnerType());
        }
        checkArgument(

      @ParametricNullness V value) {
    if (value == null) {
      // This cast is safe because null is assignable to V for all V (i.e. it is bivariant)
      @SuppressWarnings("unchecked")
      ListenableFuture<V> typedNull = (ListenableFuture<V>) ImmediateFuture.NULL;
      return typedNull;
    }
    return new ImmediateFuture<>(value);
  }

  /**

    public java.util.Map getExpressionsBySyntax()
    {
        if ( expressionsBySyntax == null )
        {
            expressionsBySyntax = new java.util.HashMap();

            java.util.List expressions = getExpressions();

            if ( expressions != null && !expressions.isEmpty() )
            {
                for ( java.util.Iterator it = expressions.iterator(); it.hasNext(); )

fi

# Gets the download command supported by the system (currently either curl or wget)
DOWNLOAD_COMMAND=""
function set_download_command () {
  # Try curl.
  if command -v curl > /dev/null; then
    if curl --version | grep Protocols  | grep https > /dev/null; then
      DOWNLOAD_COMMAND="curl -fLSs --retry 5 --retry-delay 1 --retry-connrefused"
      return
    fi
    echo curl does not support https, will try wget for downloading files.
  else

        if (accessResult == null) {
            throw new CrawlerSystemException("AccessResult is null.");
        }

        synchronized (idCountLock) {
            idCount++;
            accessResult.setId(idCount);
            AccessResultData<Long> accessResultData = accessResult.getAccessResultData();
            if (accessResultData == null) {
                accessResultData = new AccessResultDataImpl<>();

 */
public abstract class WriterUtil {

    /**
     * 指定のエンコーディングでストリームへ出力する{@link Writer}を作成します。
     *
     * @param os
     *            ストリーム。{@literal null}であってはいけません
     * @param encoding
     *            エンコーディング。{@literal null}や空文字列であってはいけません
     * @return ストリームへ出力する{@link Writer}
     */
    public static Writer create(final OutputStream os, final String encoding) {
        assertArgumentNotNull("os", os);

     * value is undefined.
     *
     * @return the location of the problem, never {@code null}
     */
    @Nonnull
    String getLocation();

    /**
     * Gets the exception that caused this problem (if any).
     *
     * @return the exception that caused this problem or {@code null} if not applicable
     */
    @Nullable
    Exception getException();

    /**

            limit += 2;
        }
        else if ( spec.startsWith("smb://") == false && host != null && host.length() == 0 ) {
            spec = "//" + spec;
            limit += 2;
        }
        super.parseURL(u, spec, start, limit);
        path = u.getPath();
        ref = u.getRef();
        if ( ref != null ) {
            path += '#' + ref;
        }
        port = u.getPort();
        if ( port == -1 ) {

    if (requestLine == "GET /favicon.ico HTTP/1.1") {
      logger.info("served $requestLine")
      return MockResponse(code = HttpURLConnection.HTTP_NOT_FOUND)
    }

    if (failFastResponse != null && responseQueue.peek() == null) {
      // Fail fast if there's no response queued up.
      return failFastResponse!!
    }

    val result = responseQueue.take()

 *  The challenge's scheme and realm are now non-null. If you are calling
    `new Challenge(scheme, realm)` you must provide non-null values. These were
    never null in challenges created by OkHttp, but could have been null in
    application code that creates challenges.

 *  New: The `TlsVersion` of a `Handshake` is now non-null. If you are calling
    `Handshake.get()` with a null TLS version, you must instead now provide a