code: func ToContext(ctx context.Context, entry *logrus.Entry) context.Context {
  	l := &ctxLogger{
  		logger: entry,
  		fields: logrus.Fields{},
  	}
  	return context.WithValue(ctx, ctxLoggerKey, l)
  }
docs: // ToContext adds the logrus.Entry to the context for extraction later.
  // Returning the new context that has been created.