type rsc.io/qr.Level

4 uses

	rsc.io/qr (current package)
		qr.go#L20: type Level int
		qr.go#L23: 	L Level = iota // 20% redundant
		qr.go#L30: func Encode(text string, level Level) (*Code, error) {

	github.com/gotd/td/telegram/auth/qrlogin
		token.go#L70: func (t Token) Image(level qr.Level) (image.Image, error) {

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