if (fdef == nullptr) {
    s = tensorflow::errors::NotFound("Cannot find function ", function_name);
    tsl::Set_TF_Status_from_Status(status, s);
    return "// error";
  }

  std::unique_ptr<tensorflow::FunctionBody> fbody;
  s = FunctionDefToBodyHelper(*fdef, tensorflow::AttrSlice(), &flib_def,
                              &fbody);
  if (!s.ok()) {
    tsl::Set_TF_Status_from_Status(status, s);
    return "// error";
  }

  // depends on an op with static output shape like tf.Const.
  absl::StatusOr<mlir::FunctionType> InferLibFunctionType(
      const FunctionBody& fbody);

  // Extracts arg and ret nodes from FunctionBody.
  void GetArgsAndRetsFromFunctionBody(
      const FunctionBody& fbody,
      absl::InlinedVector<OutputTensor, 4>* arg_nodes,
      absl::InlinedVector<OutputTensor, 4>* ret_nodes,

      return true;
    }

    auto release_handle_on_return = gtl::MakeCleanup(
        [&] { TF_CHECK_OK(lib_runtime->ReleaseHandle(handle)); });

    const FunctionBody* fbody = lib_runtime->GetFunctionBody(handle);
    TF_RETURN_IF_ERROR(GetNodesRelatedToRefVariablesInDirection(
        *fbody->graph, lib_runtime, direction, depth + 1, &callee_ref_nodes));

    if (fdef == nullptr) {
      return errors::Internal("Failed to find function ", node->type_string(),
                              " in function library.");
    }
    std::unique_ptr<FunctionBody> fbody;
    TF_RETURN_IF_ERROR(
        FunctionDefToBodyHelper(*fdef, node->attrs(), library, &fbody));

    InlineFunctionBodyOptions inline_opts;

			d.Values = p.exprList()
		}
	}

	return d
}

// FunctionDecl = "func" FunctionName [ TypeParams ] ( Function | Signature ) .
// FunctionName = identifier .
// Function     = Signature FunctionBody .
// MethodDecl   = "func" Receiver MethodName ( Function | Signature ) .
// Receiver     = Parameters .
func (p *parser) funcDeclOrNil() *FuncDecl {
	if trace {
		defer p.trace("funcDecl")()
	}

<p>
A function declaration binds an identifier, the <i>function name</i>,
to a function.
</p>

<pre class="ebnf">
FunctionDecl = "func" FunctionName Signature [ FunctionBody ] .
FunctionName = identifier .
FunctionBody = Block .
</pre>

<p>
If the function's <a href="#Function_types">signature</a> declares
result parameters, the function body's statement list must end in

<p>
A function declaration binds an identifier, the <i>function name</i>,
to a function.
</p>

<pre class="ebnf">
FunctionDecl = "func" FunctionName [ TypeParameters ] Signature [ FunctionBody ] .
FunctionName = identifier .
FunctionBody = Block .
</pre>

<p>
If the function's <a href="#Function_types">signature</a> declares
result parameters, the function body's statement list must end in