    -- | Historically, this module defined an orphan @Semigroup@ instance for
    -- @FingerTree@ on old versions of @base@. Nowadays, the @reducers@ library
    -- no longer supports these old versions of @base@, so this module no longer
    -- defines anything. As such, you should not need to import this.
    module Data.Semigroup.Instances {-# DEPRECATED "This module no longer defines any instances. You should not need to import it." #-} where