Index: pkg/serialization/lib/src/reader_writer.dart |
diff --git a/pkg/serialization/lib/src/reader_writer.dart b/pkg/serialization/lib/src/reader_writer.dart |
index 4415e63380b7869f984808fcc410d076044524f3..12d08c20c37edb3afee6d133a84fe804d49cfa73 100644 |
--- a/pkg/serialization/lib/src/reader_writer.dart |
+++ b/pkg/serialization/lib/src/reader_writer.dart |
@@ -38,7 +38,7 @@ class Writer { |
* but also serves to record which objects we have already seen. |
*/ |
final Map<Object, Reference> references = |
- new IdentityMapPlus<Object, Reference>(); |
+ new IdentityMap<Object, Reference>(); |
/** |
* The state of objects that need to be serialized is stored here. |