private static String mapFcName( String name ) {
		switch( name ) {
			case "sans":		return "sansserif";
			case "sans-serif":	return "sansserif";
			case "serif":		return "serif";
			case "monospace":	return "monospaced";
		}
		return null;
	}
map GTK/fontconfig names to equivalent JDK logical font name
flatlaf-core/src/main/java/com/formdev/flatlaf/LinuxFontPolicy.java