code: def url
        return unless self.asset
        return self.asset.url unless persisted?
        self.asset.url(ei: Base64.urlsafe_encode64(self.id.to_s))
      end
docs: @!attribute embeddable_type
     @return [String, nil] The type of the #embeddable association
   @!attribute embeddable_id
     @return [String, Integer, nil] The uuid (or id) of the #embeddable association
   @!attribute asset_uid
     @return [String, nil] The unique id of the Dragonfly #asset
   @!attribute asset_name
     @return [String, nil] The name of the Dragonfly #asset
   Dragonfly url for the asset.
  
   @return [String] the url for the dragonfly asset