Codeigniter 4 V 4.5.1 $this->db problem

The documentation is not clear to me, can you give me a practical example
I can't do as in CI3 and continue using $this->db->table(), are there any problems with this?

PHP Code:

public function __construct()
{
    parent::__construct();
} 


Now if I do 

PHP Code:

$this->db->table('mytable')  


it works, is this a correct approach?