This is just an idea but how about something like:
```go
LogLevels = map[string][]string
{
  "debug": []string{"debug"}, 
  "info": []string{"debug", "info"}, 
  "warn": []string {"debug", "info", "warn"}
}
```
I've always used the log level greater/less than strategy too but would be nice to find a better way.