SwaggerUI - Version of default and description keywords

Hi,

we are using the swagger UI version 3.17.2 (30/06/2018). We are not able to upgrade the version for the time being.
We are trying to use the keywords "default" and "description" however, as opposed to the swagger editor result, they are not being showed in our application (attached some images).
Can someone tell if these keywords are from a newer version?

Kind regards,

André Felício