-
-// callback function that can be used by the client to bring in
-// certain own packages into the root set
-typedef bool (*InRootSetFunc)(pkgCache::PkgIterator);
-
-// Mark all reachable packages with pkgDepCache::StateCache.Marked
-// the root-set are all essential packages+everything that was installed
-// manually
-//
-// If InRootSetFunc is set, it will be called for each PkgIterator. This
-// is usefull for clients that have there own idea about the root-set
-//
-// Everything that is not reach can be removed
-bool pkgMarkUsed(pkgDepCache &Cache, InRootSetFunc f=NULL);
-