orderBY with prefetched table

[abapseres]

Hello,

I would like to sort query results with a prefetched table propertie, but it 
don't work :


ObjectSelect.query(Table1.class)
     .prefetch(Table1.TO_TABLE2.joint())
     .orderBy(Table1.LIBELLE1.asc())
     .orderBy(Table2.LIBELLE2.asc()) --> dont work
     .select(getObjectContext())


Is it possible to do something like that ?

Thank you