def self_service_notifications_enabled=(new_val)
      return if new_val == self_service_notifications_enabled
      validate_notifications_supported
      JSS::Validate.boolean new_val
      @self_service_notifications_enabled = new_val
      @need_to_update = true
    end
def self_service_notifications_enabled=(new_val)
      return if new_val == self_service_notifications_enabled
      validate_notifications_supported
      JSS::Validate.boolean new_val
      @self_service_notifications_enabled = new_val
      @need_to_update = true
    end
en/disable notifications

 @param new_val [Boolean] should we display notifications?

 @return [void]