code: func (cs *ConnStats) AvgRPCCalls() (write float64, read float64) {
  	return float64(cs.WriteCalls) / float64(cs.RPCCalls), float64(cs.ReadCalls) / float64(cs.RPCCalls)
  }
docs: // AvgRPCCalls returns the average number of write() / read() syscalls per PRC.
  //
  // Use stats returned from ConnStats.Snapshot() on live Client and / or Server,
  // since the original stats can be updated by concurrently running goroutines.