1package installer 2 3type Logger interface { 4 Successf(format string, args ...interface{}) 5 Failuref(format string, args ...interface{}) 6 7 Info(args ...interface{}) 8 Infof(format string, args ...interface{}) 9 Debug(args ...interface{}) 10 Debugf(format string, args ...interface{}) 11 Warn(args ...interface{}) 12 Warnf(format string, args ...interface{}) 13 Error(args ...interface{}) 14 Errorf(format string, args ...interface{}) 15} 16