namespace boost {
  namespace text {
    namespace v1 {
      template<nf Normalization, code_point_iter I, std::sentinel_for< I > S, 
               utf_string String> 
        void normalize_append(I, S, String &);
      template<nf Normalization, code_point_range R, utf_string String> 
        void normalize_append(R &&, String &);
      template<nf Normalization, utf_string String> void normalize(String &);
    }
  }
}