code: func (lw logrusWrapper) V(l int) bool {
  	// translate to logrus level
  	logrusLevel := 4 - l
  	return int(lw.Logger.Level) <= logrusLevel
  }
docs: // V provides the functionality that returns whether a particular log level is at
  // least l - this is needed to meet the LoggerV2 interface.  GRPC's logging levels
  // are: https://github.com/grpc/grpc-go/blob/master/grpclog/loggerv2.go#L71
  // 0=info, 1=warning, 2=error, 3=fatal
  // logrus's are: https://github.com/sirupsen/logrus/blob/master/logrus.go
  // 0=panic, 1=fatal, 2=error, 3=warn, 4=info, 5=debug