MapSource source = new MapSource();
source.setExample( new HashMap<JAXBElement<String>, XMLGregorianCalendar>() );
source.getExample().put( createJaxb( "TEST" ), createXmlCal( 1999, 3, 2, 60 ) );
MapTarget target = MapSourceTargetMapper.INSTANCE.sourceToTarget( source );
assertThat( target ).isNotNull();
assertThat( target.getExample().get( "TEST" ) ).isEqualTo( "1999-03-02+01:00" );
}