the add-opens. Right now that doesn't seem worth the effort, though.
    -->
    <test.add.opens>
      --add-opens java.base/java.lang=ALL-UNNAMED
      --add-opens java.base/java.util=ALL-UNNAMED
      --add-opens java.base/sun.security.jca=ALL-UNNAMED
    </test.add.opens>
    <module.status>integration</module.status>

    the add-opens. Right now that doesn't seem worth the effort, though.
    -->
    <test.add.opens>
      --add-opens java.base/java.lang=ALL-UNNAMED
      --add-opens java.base/java.util=ALL-UNNAMED
      --add-opens java.base/sun.security.jca=ALL-UNNAMED
    </test.add.opens>
    <module.status>integration</module.status>

   * the source will contain the concatenated data from the streams of the underlying sources.
   *
   * <p>Only one underlying stream will be open at a time. Closing the concatenated stream will
   * close the open underlying stream.
   *
   * @param sources the sources to concatenate
   * @return a {@code CharSource} containing the concatenated data
   * @since 15.0
   */

   * the source will contain the concatenated data from the streams of the underlying sources.
   *
   * <p>Only one underlying stream will be open at a time. Closing the concatenated stream will
   * close the open underlying stream.
   *
   * @param sources the sources to concatenate
   * @return a {@code CharSource} containing the concatenated data
   * @since 15.0
   */

        } else {
            task.run();
        }
    }

    /**
     * Opens a connection to the specified URL.
     *
     * @param u the URL
     * @return the HttpURLConnection
     * @throws IOException if an I/O exception occurs
     */
    protected HttpURLConnection open(final URL u) throws IOException {

   * the source will contain the concatenated data from the streams of the underlying sources.
   *
   * <p>Only one underlying stream will be open at a time. Closing the concatenated stream will
   * close the open underlying stream.
   *
   * @param sources the sources to concatenate
   * @return a {@code ByteSource} containing the concatenated data
   * @since 15.0
   */

    @Throws(IOException::class)
    private fun invalidLengths(strings: List<String>): Nothing = throw IOException("unexpected journal line: $strings")

    /**
     * Returns a snapshot of this entry. This opens all streams eagerly to guarantee that we see a
     * single published snapshot. If we opened streams lazily then the streams could come from
     * different edits.
     */
    internal fun snapshot(): Snapshot? {

    expectAddFailure(sortedMultiset.tailMultiset(b.getElement(), OPEN), b);
    expectAddFailure(sortedMultiset.tailMultiset(c.getElement(), CLOSED), a);
    expectAddFailure(sortedMultiset.tailMultiset(c.getElement(), CLOSED), b);
    expectAddFailure(sortedMultiset.tailMultiset(c.getElement(), OPEN), a);
    expectAddFailure(sortedMultiset.tailMultiset(c.getElement(), OPEN), b);

    expectAddFailure(sortedMultiset.tailMultiset(b.getElement(), OPEN), b);
    expectAddFailure(sortedMultiset.tailMultiset(c.getElement(), CLOSED), a);
    expectAddFailure(sortedMultiset.tailMultiset(c.getElement(), CLOSED), b);
    expectAddFailure(sortedMultiset.tailMultiset(c.getElement(), OPEN), a);
    expectAddFailure(sortedMultiset.tailMultiset(c.getElement(), OPEN), b);

      }
    }

    open fun get(): Builder = method("GET", null)

    open fun head(): Builder = method("HEAD", null)

    open fun post(body: RequestBody): Builder = method("POST", body)

    @JvmOverloads
    open fun delete(body: RequestBody? = RequestBody.EMPTY): Builder = method("DELETE", body)

    open fun put(body: RequestBody): Builder = method("PUT", body)