Pagination with Custom model

What do you mean by custom model?

I have examples for pagination in these 2 articles:
https://includebeer.com/en/blog/how-to-b...r-4-part-4
https://includebeer.com/en/blog/how-to-b...r-4-part-5

Hi, if you refer to my question I have posted the code.
By "custom model" I mean that I am not extending codeigniter's model but I have built a model of my own.
If I extend Codeigniter's model I have no problem with pagination. But with the custom model it does not work.
On the code I have posted, how would you add pagination?

---

CONTROLLER:

PHP Code:

<?php

namespace App\Controllers;

use App\Models\CustomModel;

class Annunci extends BaseController
{

  public function index()
  {
     $model = new CustomModel();
     $data['annunci'] = $model->annunci();
     $data['page']    = $model->pager;

     return view('cet', $data);
  }
} 


MODEL:

PHP Code:

protected $table = 'annunci';

public function annunci()
{
  return $this->orderBy('data', 'DESC')->paginate();
} 


VIEW:

PHP Code:

<?php foreach ($annunci as $value): ?>
  <span><?= $value->id ?></span>
<?php endforeach ?>

It's very recommended to read userguide

Hi,
I believe your answer assumes I am extending Codeigniter's model, am I right?
If so, I am not doing that. Mine is a custom model