/**
 * <p>
 * {@link ESSourceReader} reads documents from Elasticsearch using the scroll API.
 * It implements the {@link DocumentReader} interface to provide a way to iterate over documents
 * in a large index without loading all of them into memory at once.
 * </p>
 *
 * <p>
 * The reader supports limiting the number of documents read based on a percentage of the total documents

      return new ForwardingSource(source) {
        long totalBytesRead = 0L;

        @Override public long read(Buffer sink, long byteCount) throws IOException {
          long bytesRead = super.read(sink, byteCount);
          // read() returns the number of bytes read, or -1 if this source is exhausted.
          totalBytesRead += bytesRead != -1 ? bytesRead : 0;

      current = it.next().openStream();
    }
  }

  @Override
  public int read(char[] cbuf, int off, int len) throws IOException {
    checkNotNull(cbuf);
    if (current == null) {
      return -1;
    }
    int result = current.read(cbuf, off, len);
    if (result == -1) {
      advance();
      return read(cbuf, off, len);
    }
    return result;
  }

  @Override

    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);
  }

      continue

    # In Python, MSYS, Linux-like paths are automatically read as Windows paths
    # with forward slashes, e.g. 'C:/Program Files', instead of
    # '/c/Program Files', thus becoming converted simply by virtue of having
    # been read.
    converted_vars[var] = value

  var_str = '\n'.join(f'{k}="{v}"'
                      for k, v in converted_vars.items())

    }

    /**
     * Returns the number of bytes available to read.
     * @return the number of available bytes
     * @throws IOException if an I/O error occurs
     */
    public int available() throws IOException {
        return this.dis.available();
    }

    /**
     * Reads bytes into the specified array.
     * @param b the byte array to read into
     * @throws IOException if an I/O error occurs
     */

   * should not be read.
   */
  @get:JvmName("networkResponse") val networkResponse: Response?,
  /**
   * Returns the raw response received from the cache. Will be null if this response didn't use
   * the cache. For conditional get requests the cache response and network response may both be
   * non-null. The body of the returned response should not be read.
   */

                throw new PACDecodingException("Not a kerberos token");
            }

            int readLow = stream.read() & 0xff;
            int readHigh = stream.read() & 0xff;
            int read = (readHigh << 8) + readLow;
            if (read != 0x01) {
                throw new PACDecodingException("Malformed kerberos token");
            }

	processIORCharBytesMD             = NewCounterMD(processIORCharBytes, "Total bytes read by the process from the underlying storage system including cache, /proc/[pid]/io rchar")
	processIOReadBytesMD              = NewCounterMD(processIOReadBytes, "Total bytes read by the process from the underlying storage system, /proc/[pid]/io read_bytes")

        exchange.finishRequest()
      }
    } catch (e: IOException) {
      if (e is ConnectionShutdownException) {
        throw e // No request was sent so there's no response to read.
      }
      if (!exchange.hasFailure) {
        throw e // Don't attempt to read the response; we failed to send the request.
      }
      sendRequestException = e
    }

    try {
      if (responseBuilder == null) {