Method Errorf

ui/ui.go:16–16

(format string, a ...interface{})

	Printf(format string, a ...interface{}) (n int, err error)
	Println(a ...interface{}) (n int, err error)
	Errorf(format string, a ...interface{}) (n int, err error)
	Errorln(a ...interface{}) (n int, err error)
}