title: Swagger output filtering
body: <p>I want a way to affect on swagger output documentation. The issue is that user that asks docs can have permissions only to some of methods that described in swagger so I want to exclude specific methods from output. The worst approach I consider is catch swagger.json request by middleware and then just check what methods requested user has access to and exclude necessary paths. But I don't like it very much so may be there is built in feature to do that?</p>