const runtime.emptyOne

11 uses

	runtime (current package)
		map.go#L94: 	emptyOne       = 1 // this cell is empty
		map.go#L112: 	return x <= emptyOne
		map.go#L205: 	return h > emptyOne && h < minTopHash
		map.go#L762: 			b.tophash[i] = emptyOne
		map.go#L790: 				if b.tophash[i] != emptyOne {
		map_fast32.go#L316: 			b.tophash[i] = emptyOne
		map_fast32.go#L342: 				if b.tophash[i] != emptyOne {
		map_fast64.go#L318: 			b.tophash[i] = emptyOne
		map_fast64.go#L344: 				if b.tophash[i] != emptyOne {
		map_faststr.go#L344: 			b.tophash[i] = emptyOne
		map_faststr.go#L370: 				if b.tophash[i] != emptyOne {