switch (lastChar) {
          case 'd':
            timeUnit = DAYS;
            break;
          case 'h':
            timeUnit = HOURS;
            break;
          case 'm':
            timeUnit = MINUTES;
            break;
          case 's':
            timeUnit = SECONDS;
            break;
          default:
            throw new IllegalArgumentException(

        switch (lastChar) {
          case 'd':
            timeUnit = DAYS;
            break;
          case 'h':
            timeUnit = HOURS;
            break;
          case 'm':
            timeUnit = MINUTES;
            break;
          case 's':
            timeUnit = SECONDS;
            break;
          default:
            throw new IllegalArgumentException(

        case VALID_INPUT_DATA:
          outputFuture.set(RESULT_DATA);
          break;
        case SLOW_OUTPUT_VALID_INPUT_DATA:
          break; // do nothing to the result
        case SLOW_FUNC_VALID_INPUT_DATA:
          funcIsWaitingLatch.countDown();
          awaitUninterruptibly(funcCompletionLatch);
          break;
        case EXCEPTION_DATA:
          throw EXCEPTION;
      }
      return outputFuture;

        case VALID_INPUT_DATA:
          outputFuture.set(RESULT_DATA);
          break;
        case SLOW_OUTPUT_VALID_INPUT_DATA:
          break; // do nothing to the result
        case SLOW_FUNC_VALID_INPUT_DATA:
          funcIsWaitingLatch.countDown();
          awaitUninterruptibly(funcCompletionLatch);
          break;
        case EXCEPTION_DATA:
          throw EXCEPTION;
      }
      return outputFuture;

    if (webSocket != null) throw new IllegalStateException();

    RtmStartResponse rtmStartResponse = slackApi.rtmStart(accessToken);
    webSocket = slackApi.rtm(rtmStartResponse.url, this);
  }

  // TODO(jwilson): can I read the response body? Do I have to?
  //                the body from slack is a 0-byte-buffer
  @Override public synchronized void onOpen(WebSocket webSocket, Response response) {
    System.out.println("onOpen: " + response);
  }

    reader.close();
  }

  @Override
  public int read() throws IOException {
    return (read(singleByte) == 1) ? toUnsignedInt(singleByte[0]) : -1;
  }

  // TODO(chrisn): Consider trying to encode/flush directly to the argument byte
  // buffer when possible.
  @Override
  public int read(byte[] b, int off, int len) throws IOException {
    // Obey InputStream contract.

          k2 ^= (long) toUnsignedInt(bb.get(9)) << 8; // fall through
        case 9:
          k2 ^= (long) toUnsignedInt(bb.get(8)); // fall through
        case 8:
          k1 ^= bb.getLong();
          break;
        case 7:
          k1 ^= (long) toUnsignedInt(bb.get(6)) << 48; // fall through
        case 6:
          k1 ^= (long) toUnsignedInt(bb.get(5)) << 40; // fall through
        case 5:

              }
              require(host != null) {
                "Invalid URL host: \"${input.substring(pos, portColonOffset)}\""
              }
              pos = componentDelimiterOffset
              break@authority
            }
          }
        }
      } else {
        // This is a relative link. Copy over all authority components. Also maybe the path & query.

                log.debug(message, throwable);
                break;
            case INFO:
                log.info(message, throwable);
                break;
            case WARN:
                log.warn(message, throwable);
                break;
            case ERROR:
                log.error(message, throwable);
                break;
            case FATAL:
                log.fatal(message, throwable);

      object : Source {
        var closed = false

        override fun close() {
          closed = true
        }

        override fun read(
          sink: Buffer,
          byteCount: Long,
        ): Long {
          check(!closed)
          return data.read(sink, byteCount)
        }

        override fun timeout(): Timeout = Timeout.NONE
      }
    return source.buffer().asResponseBody(null, -1)
  }