code: private void handleFailoverLogResponse(final ByteBuf event) {
      short partition = DcpFailoverLogResponse.vbucket(event);
      PartitionState ps = sessionState().get(partition);
      ps.setFailoverLog(DcpFailoverLogResponse.entries(event));
      sessionState().set(partition, ps);
    }
docs: Helper method to handle a failover log response.
  
  @param event the buffer representing the {@link DcpFailoverLogResponse}.