code: func (cs *ConnStats) AvgRPCBytes() (send float64, recv float64) {
  	return float64(cs.BytesWritten) / float64(cs.RPCCalls), float64(cs.BytesRead) / float64(cs.RPCCalls)
  }
docs: // AvgRPCBytes returns the average bytes sent / received per RPC.
  //
  // Use stats returned from ConnStats.Snapshot() on live Client and / or Server,
  // since the original stats can be updated by concurrently running goroutines.