+int mathed_string_width(FontInfo const &, docstring const & s);
+
+void mathedSymbolDim(MetricsBase & mb, Dimension & dim, latexkeys const * sym);
+
+void mathedSymbolDraw(PainterInfo & pi, int x, int y, latexkeys const * sym);
+
+void metricsStrRedBlack(MetricsInfo & mi, Dimension & dim, docstring const & s);