/**
* @param int $retailer_id
* @return mixed
*/
public function getAgenciesByRetailer($retailer_id)
{
return Agency::with('retailerCityAgencies.retailerCity')->whereHas('retailerCityAgencies.retailerCity', function ($q) use($retailer_id) {
$q->where('ad_retailer_id', $retailer_id);
})->get();
}
