validPath -> validPaths.

We don't need both.

Author: shlevy

hnix-store-core/src/System/Nix/Store.hs

@@ -92,8 +92,8 @@ data StoreEffects rootedPath validPath m =
       fromRootedPath :: !(rootedPath -> Path)
     , -- | Project out the underlying 'rootedPath' from a 'validPath'
       fromValidPath :: !(validPath -> rootedPath)
-    , -- | Is the given path valid?
-      validPath :: !(rootedPath -> m (Maybe validPath))
+    , -- | Which of the given paths are valid?
+      validPaths :: !(HashSet rootedPath -> HashSet validPath)
     , -- | Get the paths that refer to a given path.
       referrers :: !(validPath -> m (HashSet Path))
     , -- | Get a root to the 'Path'.