def notifiable_path
      notifiable.present? or raise ActiveRecord::RecordNotFound.new("Couldn't find notifiable #{notifiable_type}")
      notifiable.notifiable_path(target_type, key)
    end
def notifiable_path
      notifiable.present? or raise ActiveRecord::RecordNotFound.new("Couldn't find notifiable #{notifiable_type}")
      notifiable.notifiable_path(target_type, key)
    end
Returns notifiable_path to move after opening notification with notifiable.notifiable_path.

 @return [String] Notifiable path URL to move after opening notification