message: [tf.data] Changing signature of `MakeIterator` to enable propagating error status.
diff: @@ -64,7 +64,7 @@ class KafkaDatasetOp : public DatasetOpKernel {
  eof_(eof),
  timeout_(timeout) {}
  - std::unique_ptr<IteratorBase> MakeIterator(
  + std::unique_ptr<IteratorBase> MakeIteratorInternal(
  const string& prefix) const override {
  return std::unique_ptr<IteratorBase>(
  new Iterator({this, strings::StrCat(prefix, "::Kafka")}));
  