const runtime.evacuatedY

4 uses

	runtime (current package)
		map.go#L95: 	evacuatedY     = 3 // same as above, but evacuated to second half of larger table.
		map.go#L938: 		if (b.tophash[offi] != evacuatedX && b.tophash[offi] != evacuatedY) ||
		map.go#L1202: 				if evacuatedX+1 != evacuatedY || evacuatedX^1 != evacuatedY {