+std::string rate_as_string (float r);
+
+bool windows_overlap (Gtk::Window *a, Gtk::Window *b);
+
+bool overwrite_file_dialog (Gtk::Window& parent, std::string title, std::string text);
+std::string show_gdk_event_state (int state);
+bool running_from_source_tree ();
+
+} // namespace