/**
  * write replace
  *
  * @return {@link #getInstance()}
  */
 private final Object writeReplace() {
   return LaTeXDefaultFontPalette.getInstance();
 }
 /**
  * read resolve
  *
  * @return {@link #getInstance()}
  */
 private final Object readResolve() {
   return LaTeXDefaultFontPalette.getInstance();
 }