absl::flat_hash_set<Node*>* control_ret_nodes);

  // Converts a given FuncOp to a FunctionDef and adds it to the function
  // definition library
  static Status ConvertLibFunction(
      const GraphExportConfig& configs, const Dialect* tf_dialect,
      const SymbolTable& symbol_table, FuncOp function,
      FunctionLibraryDefinition* flib_def,

                        absl::flat_hash_set<Node*>* control_ret_nodes);

  // Converts a given FuncOp to a FunctionDef and adds it to the function
  // definition library
  static Status ConvertLibFunction(
      const GraphExportConfig& configs, const Dialect* tf_dialect,
      const SymbolTable& symbol_table, FuncOp function,
      FunctionLibraryDefinition* flib_def,

  // graph and converts it to a function of the module. This method is called
  // on demand because the graph flib_def does not provide an iterator
  // interface.
  Status ConvertLibFunction(llvm::StringRef func_name);

  // Returns the list of nodes in the graph. Nodes are presented in the reverse
  // order of a post-order depth-first visit starting from the graph's source
  // nodes.