urfatBro/app/geo/country/classes/Country.php

<?php

namespace App\Geo\Country\Classes;

use ORM\Entity as Entity;
use App\Geo\State\Classes\State as State;

class Country extends Entity {

    const _tableName = "geo_countries";

    const _listable = Array(
        'id',
        'name',
        'code',
        'iso2',
        'iso3',
    );
    
    const _orderable = Array(

    );

    public function states(){
        return $this->hasMany(State::class, 'country_id', $this);
    }
    
}