logging/logging.go
func NewLogFilter() *logutils.LevelFilter {
	return &logutils.LevelFilter{
		Levels:   Levels,
		MinLevel: "WARN",
		Writer:   ioutil.Discard,
	}
}
func NewLogFilter() *logutils.LevelFilter {
	return &logutils.LevelFilter{
		Levels:   Levels,
		MinLevel: "WARN",
		Writer:   ioutil.Discard,
	}
}
// NewLogFilter returns a LevelFilter that is configured with the log levels that
// we use.