message: Use graph as function in MLIR bridge, which eliminates _arg and _retval nodes.
diff: @@ -93,6 +93,8 @@ Status MlirBridgePass::Run(const GraphOptimizationPassOptions& options) {
  GraphDebugInfo debug_info;
  mlir::MLIRContext context;
  GraphImportConfig specs;
  + specs.graph_as_function = true;
  +
  GraphExportConfig confs;
  TF_ASSIGN_OR_RETURN(auto module,
  ConvertGraphToMlir(**options.graph, debug_info,
  