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

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