assertThat(letters).containsExactly("a", "c").inOrder();
  }

  public void testCharacterSplitOnEmptyString() {
    Iterable<String> nothing = Splitter.on('.').split("");
    assertThat(nothing).containsExactly("").inOrder();
  }

  public void testCharacterSplitOnEmptyStringOmitEmptyStrings() {
    assertThat(Splitter.on('.').omitEmptyStrings().split("")).isEmpty();
  }

               Licensed Material if doing so restricts exercise of the
               Licensed Rights by any recipient of the Licensed
               Material.

       6. No endorsement. Nothing in this Public License constitutes or
          may be construed as permission to assert or imply that You
          are, or that Your use of the Licensed Material is, connected

      this.future = future;
    }

    @Override
    public void run() {
      try {
        future.get();
      } catch (Exception e) {
        // nothing
      }
    }

    @SuppressWarnings("ThreadPriorityCheck") // TODO: b/175898629 - Consider onSpinWait.
    void awaitWaiting() {
      while (!isBlocked()) {

  val pins: Set<Pin>,
  internal val certificateChainCleaner: CertificateChainCleaner? = null,
) {
  /**
   * Confirms that at least one of the certificates pinned for `hostname` is in `peerCertificates`.
   * Does nothing if there are no certificates pinned for `hostname`. OkHttp calls this after a
   * successful TLS handshake, but before the connection is used.
   *

      by You to the Licensor shall be under the terms and conditions of
      this License, without any additional terms or conditions.
      Notwithstanding the above, nothing herein shall supersede or modify
      the terms of any separate license agreement you may have executed
      with Licensor regarding such Contributions.

      by You to the Licensor shall be under the terms and conditions of
      this License, without any additional terms or conditions.
      Notwithstanding the above, nothing herein shall supersede or modify
      the terms of any separate license agreement you may have executed
      with Licensor regarding such Contributions.

    override fun close() {
      closed = true
      delegate?.close() ?: run { source.close() }
    }
  }

  companion object {
    /** Empty response body with no content-type. Closing this response body does nothing. */
    @JvmField
    val EMPTY: ResponseBody = ByteString.EMPTY.toResponseBody()

    /**
     * Returns a new response body that transmits this string. If [contentType] is non-null and

    assertThrows(IndexOutOfBoundsException.class, () -> nullWriter.append(null, -1, 4));

    assertThrows(IndexOutOfBoundsException.class, () -> nullWriter.append(null, 0, 5));

    // nothing really to assert?
    assertSame(CharStreams.nullWriter(), CharStreams.nullWriter());
  }

  /**
   * Returns a reader wrapping the given reader that only reads half of the maximum number of

    assertThrows(IndexOutOfBoundsException.class, () -> nullWriter.append(null, -1, 4));

    assertThrows(IndexOutOfBoundsException.class, () -> nullWriter.append(null, 0, 5));

    // nothing really to assert?
    assertSame(CharStreams.nullWriter(), CharStreams.nullWriter());
  }

  /**
   * Returns a reader wrapping the given reader that only reads half of the maximum number of

// along with any necessary parents, and returns nil,
// or else returns an error.
// The permission bits perm (before umask) are used for all
// directories that MkdirAll creates.
// If path is already a directory, MkdirAll does nothing
// and returns nil.
func osMkdirAll(dirPath string, perm os.FileMode, baseDir string) error {
	if baseDir != "" {
		if strings.HasPrefix(baseDir, dirPath) {
			return nil
		}
	}