code: def expand(self, id_user):
          
          CmtCOLLAPSED.query.filter(db.and_(
              CmtCOLLAPSED.id_bibrec == self.id_bibrec,
              CmtCOLLAPSED.id_cmtRECORDCOMMENT == self.id,
              CmtCOLLAPSED.id_user == id_user)).delete(synchronize_session=False)
docs: Expand comment beloging to user.