Hiding views or functions definitions to defined users

Hi

Is there a working solution to hide views, functions or even any kind of
object definition to certain users, possibly using schemas (like private
schemas versus public ones) ?

The situation is as followed : we would like to give one of our partners
read/write access to a database, but we don't want them to see certain
views or functions definitions because of privacy concerns.

Thanks for any support

Laurent Perez