const math.MaxUint8

3 uses

	math (current package)
		const.go#L53: 	MaxUint8  = 1<<8 - 1            // 255

	google.golang.org/protobuf/internal/filedesc
		desc_list.go#L448: 			if ps < 0 || math.MaxUint8 <= ps {

	google.golang.org/protobuf/internal/impl
		validate.go#L141: 		if mi.numRequiredFields < math.MaxUint8 {