Errorf calls sugared.Errorf if present, else calls log.Println.

Info calls sugared.Info if present, else calls log.Println.

Infof calls sugared.Infof if present, else calls log.Println.

Init initialize log and sugaredLog For now, let's use zap Development mode.

PlainInfo calls plain.Info if present, else calls log.Println.

Sync calls plain.Sync().

Warnf calls sugared.Infof if present, else calls log.Println.