docs: public static void setSeparators (@Nonnull @Nonempty final String sOpen, @Nonnull @Nonempty final String sClose)
    {
      ValueEnforcer.notEmpty (sOpen, "Open");
      ValueEnforcer.notEmpty (sClose, "Close");
      ValueEnforcer.isFalse (sOpen.contains (sClose), "open may not contain close");
      ValueEnforcer.isFalse (sClose.contains (sOpen), "close may not contain open");
      s_sOpen = sOpen;
      s_sClose = sClose;
    }