private val messageAndCloseQueue = ArrayDeque<Any>()

  /** The total size in bytes of enqueued but not yet transmitted messages. */
  private var queueSize = 0L

  /** True if we've enqueued a close frame. No further message frames will be enqueued. */
  private var enqueuedClose = false

   * @since 15.0
   */
  public boolean isEmpty() throws IOException {
    Optional<Long> lengthIfKnown = lengthIfKnown();
    if (lengthIfKnown.isPresent()) {
      return lengthIfKnown.get() == 0L;
    }
    Closer closer = Closer.create();
    try {
      Reader reader = closer.register(openStream());
      return reader.read() == -1;
    } catch (Throwable e) {
      throw closer.rethrow(e);

    } catch (e: GeneralSecurityException) {
      throw IllegalArgumentException("failed to decode certificate", e)
    }
  }
}

internal data class TbsCertificate(
  /** This is a integer enum. Use 0L for v1, 1L for v2, and 2L for v3. */
  val version: Long,
  val serialNumber: BigInteger,
  val signature: AlgorithmIdentifier,
  val issuer: List<List<AttributeTypeAndValue>>,
  val validity: Validity,

  }

  fun writeBigInteger(value: BigInteger) {
    sink().write(value.toByteArray())
  }

  fun writeLong(v: Long) {
    val sink = sink()

    val lengthBitCount: Int =
      if (v < 0L) {
        65 - java.lang.Long.numberOfLeadingZeros(v xor -1L)
      } else {
        65 - java.lang.Long.numberOfLeadingZeros(v)
      }

    val lengthByteCount = (lengthBitCount + 7) / 8

        v3 = Long.rotateLeft(v3, 21);
        v1 ^= v2;
        v3 ^= v0;
        v2 = Long.rotateLeft(v2, 32);
      }
    }
  }

  private static final long serialVersionUID = 0L;

    }

    @Override
    public String toString() {
      return sourceFormat + ".converterTo(" + targetFormat + ")";
    }

    private static final long serialVersionUID = 0L;
  }

  abstract String normalizeWord(String word);

  String normalizeFirstWord(String word) {
    return normalizeWord(word);
  }

  private static String firstCharOnlyToUpper(String word) {

        v3 = Long.rotateLeft(v3, 21);
        v1 ^= v2;
        v3 ^= v0;
        v2 = Long.rotateLeft(v2, 32);
      }
    }
  }

  private static final long serialVersionUID = 0L;

  public int hashCode() {
    return delegate.hashCode();
  }

  @Override
  public String toString() {
    return delegate.toString();
  }

  private static final long serialVersionUID = 0L;

    }

    @Override
    public String toString() {
      return "Enums.stringConverter(" + enumClass.getName() + ".class)";
    }

    private static final long serialVersionUID = 0L;
  }

      null
    } else {
      responseBuilder
    }
  }

  override fun reportedContentLength(response: Response): Long {
    return when {
      !response.promisesBody() -> 0L
      else -> response.headersContentLength()
    }
  }

  override fun openResponseBodySource(response: Response): Source {
    return stream!!.source
  }

  override fun trailers(): Headers {