Is there a way to define one-to-many polymorphic relation through hasMany relation? I have products, offers and properties.

class Offer extends Model {
    public $belongsTo = ['product', 'My\Site\Models\Product'];
    public $morphMany = ['properties', 'name' => 'propertable'];
}
class Product extends Model {
    public $hasMany = ['offers', 'My\Site\Models\Offer'];
}
class Property extends Model {
    public $morphTo = [
       'propertable' => []
    ]
}

I need a method for Product called offerProperties. How can i do that?