;     }      template <typename Sequence, typename F>     inline     typename         enable_if<             traits::is_sequence<Sequence>           , void         >::type     for_each(Sequence& seq, F const& f)     {         detail::for_each(seq, f, typename traits::is_segmented<Sequence>::type());     }      template <typename Sequence, typename F>     inline     typename         enable_if<             traits::is_sequence<Sequence>           , void         >::type     for_each(Sequence