// If there is a sequencer node, adds a control edge from the sequencer to
    // the call node.
    void ConnectSequencerToCallNode(Graph* graph_out);

    Status ReplaceFunctionDef(FunctionLibraryDefinition* library);

   private:
    // The subgraph extracted from the input graph, suitable for being turned
    // into a FunctionDef. Inputs are fed by _Arg nodes, and outputs are