Facebook.Persistent

This package is meant to be imported as

 import Facebook.Persistent ()

because it doesn't export any symbols. However, it exports the following orphan instances:

 instance PersistField Action          -- since 0.1
 instance PersistField Id              -- since 0.1.2
 instance PersistField AppAccessToken  -- since 0.1.3
 instance PersistField UserAccessToken -- since 0.1.3