- void write(UDate start, VTZWriter& writer, UErrorCode& status) /*const*/;
- void writeSimple(UDate time, VTZWriter& writer, UErrorCode& status) /*const*/;
+ void write(UDate start, VTZWriter& writer, UErrorCode& status) const;
+ void writeSimple(UDate time, VTZWriter& writer, UErrorCode& status) const;