rem: KNHeaders::Newsgroups* newsgroups(bool create=true)     { if( (!create && n_ewsgroups.isEmpty()) || (!create && !doPost()) ) return 0; return &n_ewsgroups; }
add: virtual KNHeaders::Newsgroups* newsgroups(bool create=true)      { KNHeaders::Newsgroups *p=0; return getHeaderInstance(p, create); }
context:     KNHeaders::Newsgroups* newsgroups(bool create=true)     { if( (!create && n_ewsgroups.isEmpty()) || (!create && !doPost()) )                                                                return 0;                                                              return &n_ewsgroups; }