message: [tf.data] Fix a possible collision of performance modeling identifiers.
diff: @@ -471,7 +471,8 @@ class GroupByWindowDatasetOp : public UnaryDatasetOpKernel {
  GetDatasetFromVariantTensor(return_values[0], &returned_dataset));
  // Create an iterator for the dataset that was returned by `f`.
  - return returned_dataset->MakeIterator(ctx, prefix(),
  + return returned_dataset->MakeIterator(
  + ctx, strings::StrCat(prefix(), "::Reduce"),
  &current_group_iterator_);
  }
  