const unicode/utf16.maxRune

3 uses

	unicode/utf16 (current package)
		utf16.go#L14: 	maxRune         = '\U0010FFFF' // Maximum valid Unicode code point.
		utf16.go#L48: 	if r < surrSelf || r > maxRune {
		utf16.go#L72: 		case surrSelf <= v && v <= maxRune:

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