/// Access to the unique Messages object for the passed \p language.
/// Implementation is in LyX.cpp.
-extern Messages & getMessages(std::string const & language);
+extern Messages const & getMessages(std::string const & language);
/// Access to the unique Messages object used for GUI element.
/// Implementation is in LyX.cpp.
-extern Messages & getGuiMessages();
+extern Messages const & getGuiMessages();
} // namespace lyx