Upgrade Model CI3 to CI4

Hi all.
I'm trying to upgrade CI3 to CI4 adding namespace and use,
but Visual Studio code get 'Undefined method select'. 

Thanks in advance for help.

PHP Code:

namespace App\Models; // CI4

use CodeIgniter\Model; // CI4

defined('BASEPATH') OR exit('No direct script access allowed');

class myClass extends Model {

    public function myFunc()
    {

        $this->db->select('id, name'); // <-- UNDEFINED METHOD SELECT
        $this->db->from('table');
        $this->db->where('status', 1);
        $this->db->where('op', '');
        $this->db->group_start();
            $this->db->where('data_cal', NULL);
            $this->db->or_where('data_cal <= NOW()');
        $this->db->group_end();
        $this->db->order_by("id", "DESC");

        $query =  $this->db->get()->result();
        
        if($query) {

            return $query[0];

        } else {
            null;
        }
    }

}