if [[ -z "${im_cmd}" ]] ; then
    echo "ImageMagick (convert or magick) does not exist."
    exit 1
  fi
  check_command pdftoppm
  check_command unoconv
  tmp_pdf_file=/tmp/thumbnail.$$.pdf
  unoconv -e PageRange=1-1 -o ${tmp_pdf_file} -f pdf "${target_file}"
  if [[ ! -f ${tmp_pdf_file} ]] ; then
    echo "unoconv does not work."
    exit 1
  fi
  tmp_png_prefix=/tmp/thumbnail.png.$$

     * @throws CurlException if the content does not exist.
     */
    public InputStream getContentAsStream() throws IOException {
        if (contentCache == null) {
            if (contentException != null) {
                throw new CurlException("The content does not exist.", contentException);
            } else {
                throw new CurlException("The content does not exist.");
            }
        }

    /**
     * Recursively deletes a directory and all its contents.
     * Does not throw exceptions, only logs warnings if deletion fails.
     *
     * @param dir the directory to delete
     */
    protected void closeQuietly(final Path dir) {
        if (Files.notExists(dir)) {
            if (logger.isDebugEnabled()) {
                logger.debug("Path does not exist: path={}", dir);
            }
            return;
        }

  static CharBuffer createBuffer() {
    return CharBuffer.allocate(DEFAULT_BUF_SIZE);
  }

  private CharStreams() {}

  /**
   * Copies all characters between the {@link Readable} and {@link Appendable} objects. Does not
   * close or flush either object.
   *
   * @param from the object to read from
   * @param to the object to write to
   * @return the number of characters copied
   * @throws IOException if an I/O error occurs

   * edges().contains(endpoints)}.
   *
   * <p>Unlike the other {@code EndpointPair}-accepting methods, this method does not throw if the
   * endpoints are unordered; it simply returns false. This is for consistency with the behavior of
   * {@link Collection#contains(Object)} (which does not generally throw if the object cannot be
   * present in the collection), and the desire to have this method's behavior be compatible with

   */
  Graph<N> asGraph();

  //
  // Network properties
  //

  /**
   * Returns true if this network allows parallel edges. Attempting to add a parallel edge to a
   * network that does not allow them will throw an {@link IllegalArgumentException}.
   */
  boolean allowsParallelEdges();

  /** Returns the order of iteration for the elements of {@link #edges()}. */
  ElementOrder<E> edgeOrder();

 *
 * @author Jared Levy
 */
@GwtIncompatible
@J2ktIncompatible
final class Serialization {
  private Serialization() {}

  /**
   * Stores the contents of a map in an output stream, as part of serialization. It does not support
   * concurrent maps whose content may change while the method is running.
   *
   * <p>The serialized output consists of the number of entries, first key, first value, second key,
   * second value, and so on.

  private long elapsedNanos;
  private long startTick;

  /**
   * Creates (but does not start) a new stopwatch using {@link System#nanoTime} as its time source.
   *
   * @since 15.0
   */
  public static Stopwatch createUnstarted() {
    return new Stopwatch();
  }

  /**
   * Creates (but does not start) a new stopwatch, using the specified time source.
   *
   * @since 15.0
   */

        assertEquals("https://example.com/page3", responseData3.getUrl());
    }

    public void test_processDoesNotModifyResponseData() {
        // Test that process does not modify ResponseData
        NullResponseProcessor processor = new NullResponseProcessor();
        ResponseData responseData = new ResponseData();

        // Set various properties

   * incoming edges.
   */
  private Set<N> predecessorsOrEmpty(N node) {
    if (edgeType == EdgeType.INCOMING || edgeType == EdgeType.BOTH) {
      return graph.predecessors(node);
    } else {
      return ImmutableSet.of();
    }
  }

  /**
   * Returns the successors of the given node, or an empty set if this set does not represent
   * outgoing edges.
   */