[VM/Service] Fix documentation of ObjectIdRing
TEST=only a comment was changed
Issue: https://github.com/dart-lang/sdk/issues/55869
Change-Id: I42485e2108d2619ba9ae8cef89728e312b29b8b6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/379542
Reviewed-by: Ben Konyi <bkonyi@google.com>
Commit-Queue: Derek Xu <derekx@google.com>
diff --git a/runtime/vm/object_id_ring.h b/runtime/vm/object_id_ring.h
index d94965c..07bc854 100644
--- a/runtime/vm/object_id_ring.h
+++ b/runtime/vm/object_id_ring.h
@@ -14,11 +14,11 @@
class ObjectPointerVisitor;
class JSONStream;
-// A ring buffer of object pointers that have been given an id. An object
-// may be pointed to by multiple ids. Objects contained in the ring will
-// be preserved across scavenges but not old space collections.
-// When the ring buffer wraps around older objects will be replaced and their
-// ids will be invalidated.
+// A ring buffer of object pointers that have been given temporary Service IDs.
+// An object may be pointed to by multiple IDs. The objects associated with the
+// pointers in the ring will be preserved across garbage collections. When the
+// ring buffer wraps around, older objects will be replaced and their IDs will
+// become expired.
class ObjectIdRing {
public:
enum LookupResult {
