src/server/pkg/log/log.go
func (f FormatterFunc) Format(entry *logrus.Entry) ([]byte, error) {
	return f(entry)
}
func (f FormatterFunc) Format(entry *logrus.Entry) ([]byte, error) {
	return f(entry)
}
// Format proxies the closure in order to satisfy `logrus.Formatter`'s
// interface.