const unicode.LowerCase

4 uses

	unicode (current package)
		letter.go#L72: 	LowerCase
		letter.go#L286: 	return To(LowerCase, r)
		letter.go#L320: 	r1, hadMapping := to(LowerCase, r, []CaseRange(special))
		letter.go#L382: 		if l := convertCase(LowerCase, r, cr); l != r {