// not-yet-created next iteration nodes). Use the underlying NodeBuilder API
  // directly to create the back edge.
  NodeBuilder::NodeOut enter_input(enter_output.node(), enter_output.index());

  const int next_output_index = 0;
  DataType dtype = enter_output.node()->output_type(0);
  NodeBuilder::NodeOut next_input(NextIterationName(scope, loop_var_idx),

    return errors::Unimplemented("Stream not seekable");
  }

 private:
  string& str_;
};

TEST(Dump, TextualIrToFileSuccess) {
  Graph graph(OpRegistry::Global());
  Node* node;
  TF_CHECK_OK(NodeBuilder("A", "NoOp").Finalize(&graph, &node));

  setenv("TF_DUMP_GRAPH_PREFIX", testing::TmpDir().c_str(), 1);
  UseMlirForGraphDump(MlirDumpConfig());
  string ret = DumpGraphToFile("tir", graph);

  // dependency edge to the _SOURCE node.
  for (int64_t i = 0, end = args.size(); i < end; ++i) {
    Node* node;
    string arg_name = absl::StrCat("_arg", i);
    Status status =
        NodeBuilder(arg_name, FunctionLibraryDefinition::kArgOp)
            .ControlInput(graph->source_node())
            .Attr("T", args[i].kind == XlaArgument::kResource ? DT_RESOURCE

    const ApiDef& api_def,
    const std::unordered_map<string, string>& inferred_input_attrs);

struct OpInfo {
  // graph_op_def: The OpDef used by the runtime, has the names that
  //   must be used when calling NodeBuilder.
  // interface_op_def: The OpDef used in the interface in the generated
  //   code, with possibly overridden names and defaults.
  OpInfo(const OpDef& graph_op_def, const ApiDef& api_def,