public long getBytesTransferred() {
        return bytesTransferred.get();
    }

    /**
     * Get total number of operation errors
     *
     * @return error count
     */
    public long getOperationErrors() {
        return operationErrors.get();
    }

    /**
     * Get total number of connections created
     *
     * @return connection count
     */

  }

  data class ConnectionClosed(
    override val timestampNs: Long,
    override val connection: Connection,
  ) : ConnectionEvent()

  data class ConnectionAcquired(
    override val timestampNs: Long,
    override val connection: Connection,
    val call: Call,
  ) : ConnectionEvent()

  data class ConnectionReleased(
    override val timestampNs: Long,
    override val connection: Connection,
    val call: Call,

    // was some asymmetry so that the initial v0 and v1 differ from v2 and v3.
    private long v0 = 0x736f6d6570736575L;
    private long v1 = 0x646f72616e646f6dL;
    private long v2 = 0x6c7967656e657261L;
    private long v3 = 0x7465646279746573L;

    // The number of bytes in the input.
    private long b = 0;

    // The final 64-bit chunk includes the last 0 through 7 bytes of m followed by null bytes

public class WitnessHeartbeatMessage extends WitnessRpcMessage {

    // Input parameters for WitnessHeartbeat
    private byte[] contextHandle;
    private long sequenceNumber;

    // Output parameters for WitnessHeartbeat
    private long responseSequenceNumber;
    private long heartbeatInterval;

    /**
     * Creates a new WitnessHeartbeat RPC message.
     */
    public WitnessHeartbeatMessage() {

      }
      return bufferedSource;
    }

    private Source source(Source source) {
      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.

  // Double#doubleToRawLongBits(double)} spec.
  static final long SIGNIFICAND_MASK = 0x000fffffffffffffL;

  // The mask for the exponent, according to the {@link
  // Double#doubleToRawLongBits(double)} spec.
  static final long EXPONENT_MASK = 0x7ff0000000000000L;

  // The mask for the sign, according to the {@link
  // Double#doubleToRawLongBits(double)} spec.
  static final long SIGN_MASK = 0x8000000000000000L;

        return this;
    }

    public void setCreatedTime_Equal(Long createdTime) {
        setCreatedTime_Term(createdTime, null);
    }

    public void setCreatedTime_Equal(Long createdTime, ConditionOptionCall<TermQueryBuilder> opLambda) {
        setCreatedTime_Term(createdTime, opLambda);
    }

    public void setCreatedTime_Term(Long createdTime) {
        setCreatedTime_Term(createdTime, null);
    }

        public short percent;
        /** Used space in bytes */
        public long used;
        /** Filesystem path */
        public String path;
        /** Free space in bytes */
        public long free;
        /** Total space in bytes */
        public long total;
        /** Usable space in bytes */
        public long usable;
    }

    /**

    public class DocMeta implements Serializable {

        private static final long serialVersionUID = 1L;

        protected String id;

        protected Long version;

        protected Long seqNo;

        protected Long primaryTerm;

        private transient RequestOptionCall<IndexRequestBuilder> indexOption;

    }

    @Override
    public void info(final String message, final Throwable t) {
        logger.logp(Level.INFO, sourceClass, null, message, t);
    }

    @Override
    public boolean isDebugEnabled() {
        return logger.isLoggable(Level.FINE);
    }

    @Override
    public void debug(final String message) {
        logger.logp(Level.FINE, sourceClass, null, message);