Publicize constructor in DiffToByteCache.
@@ -1263,7 +1263,6 @@ public final class BuildOptions implements Cloneable, Serializable {
private static final ConcurrentHashMap<ByteString, OptionsDiffForReconstruction>
byteStringToDiffMap = new ConcurrentHashMap<>();
- @VisibleForTesting
public DiffToByteCache() {}
@Override
