// cfcClient 为已创建的CFC Client对象
args := &api.GetFunctionArgs{
    FunctionName: "functionName"
}
result, err := cfcClient.GetFunction(args)
if err != nil {
	switch realErr := err.(type) {
	case *bce.BceClientError:
		fmt.Println("client occurs error:", realErr.Error())
	case *bce.BceServiceError:
		fmt.Println("service occurs error:", realErr.Error())
	default:
		fmt.Println("unknown error:", err)
	}
} else {
	fmt.Println("get function detail success: ", result)
}