Size of my model is very large

Hi,

i made a var_dump of my model object and it is very large. I see things like the mysql connection with pasword and username. Is this correct or is it a mistake in my model?

PHP Code:

class Test_model extends Model {
    protected $table = 'table';
    protected $primaryKey = 'id';
    protected $returnType = Test_model::class;
}

// the var_dump
App\Models\Test_model Object
(
...

[db:protected] => CodeIgniter\Database\MySQLi\Connection Object
        (
            [DSN:protected] => 
            [port:protected] => xxx
            [hostname:protected] => xxx
            [username:protected] => xxx
            [password:protected] => xxx
            [database:protected] => xxx
...
[classmap:protected] => Array(//output of a huge amount of classnames)