throw IOException(npe)
      }
    }
  }

  /**
   * Does all the work to build an HTTPS connection over a proxy tunnel. The catch here is that a
   * proxy server can issue an auth challenge and then close the connection.
   *
   * @return the next plan to attempt, or null if no further attempt should be made either because
   *     we've successfully connected or because no further attempts should be made.

	public final fun matchesCertificate (Ljava/security/cert/X509Certificate;)Z
	public final fun matchesHostname (Ljava/lang/String;)Z
	public fun toString ()Ljava/lang/String;
}

public final class okhttp3/Challenge {
	public final fun -deprecated_authParams ()Ljava/util/Map;
	public final fun -deprecated_charset ()Ljava/nio/charset/Charset;
	public final fun -deprecated_realm ()Ljava/lang/String;

    if (header.matches("\\d+".toRegex())) {
      return Integer.valueOf(header)
    }
    return Integer.MAX_VALUE
  }

  companion object {
    /**
     * How many redirects and auth challenges should we attempt? Chrome follows 21 redirects; Firefox,
     * curl, and wget follow 20; Safari follows 16; and HTTP/1.0 recommends 5.
     */
    private const val MAX_FOLLOW_UPS = 20
  }