Debugf logs to the DEBUG log.

Errorf logs to the ERROR, WARN, and INFO logs.

Fatalf logs an error message and then exits.

Infof logs to the INFO log.

Logger returns underlying logger.

LogrusLogger returns the logrus logger used by the underlying logger.

PanicExit logs error and exits.

Warningf logs to the WARN and INFO logs.

Interface is logger interface.