int NumInputs() const;
  int NumOutputs() const;
  ArgView OnlyInput() const;
  ArgView OnlyOutput() const;

  string FunctionName() const;
  string VariableName() const;
  string OpNameString() const;
  string Summary() const;
  std::vector<string> Description() const;
  bool IsListOp() const;

 private:
  OpSpec op_;
  std::vector<ArgView> input_args_;
  std::vector<ArgView> output_args_;

  // Create Op variable and initialize it
  Statement("AbstractOperationPtr $0(ctx->CreateOperation())",
            op_.VariableName());
  TFStatement(Call(op_.VariableName(), "Reset",
                   {op_.OpNameString(), "raw_device_name"}));
  TFStatement(Call("MaybeSetOpName", {op_.VariableName() + ".get()", "name"}));
  // Set each input
  for (const ArgView& ar : op_.Inputs()) {

}

ArgView OpView::OnlyOutput() const {
  CHECK_EQ(output_args_.size(), 1);  // Crash OK
  return output_args_.front();
}

string OpView::FunctionName() const { return op_.name(); }

string OpView::OpNameString() const { return Quoted(op_.name()); }

string OpView::VariableName() const { return "op_ptr"; }

std::vector<string> OpView::Description() const {
  return str_util::Split(op_.description(), "\n");
}