/** The key of the message: Unknown version for upgrade. */
    public static final String ERRORS_unknown_version_for_upgrade = "{errors.unknown_version_for_upgrade}";

    /** The key of the message: Failed to upgrade from {0}. */
    public static final String ERRORS_failed_to_upgrade_from = "{errors.failed_to_upgrade_from}";

 * Use `Protocol` to describe framing.
 * Implement write timeouts for HTTP/1.1 streams.
 * Avoid use of SPDY stream ID 1, as that's typically used for UPGRADE.
 * Support OAuth in `Authenticator`.
 * Permit a dangling semicolon in media type parsing.


## Version 1.x

[Change log](changelog_1x.md)

      while (awaitPongsReceived < awaitPingsSent) {
        wait()
      }
    }
  }

  @Throws(IOException::class)
  fun flush() {
    writer.flush()
  }

  /**
   * Degrades this connection such that new streams can neither be created locally, nor accepted
   * from the remote peer. Existing streams are not impacted. This is intended to permit an endpoint

     */
    String getOnlineHelpNameBackup();

    /**
     * Get the value for the key 'online.help.name.upgrade'. <br>
     * The value is, e.g. upgrade <br>
     * comment: Online help key for upgrade.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getOnlineHelpNameUpgrade();

    /**

    /** The key of the message: Home Directory */
    public static final String LABELS_HOME_DIRECTORY = "{labels.homeDirectory}";

    /** The key of the message: Upgrade */
    public static final String LABELS_upgrade_title_configuration = "{labels.upgrade_title_configuration}";

    /** The key of the message: Data Migration */