/**
  * Will check if the current library uses any entry types from another mode. For example it will
  * warn the user if he uses entry types defined for Biblatex inside a BibTeX library.
  */
 @Override
 public List<IntegrityMessage> check(BibEntry entry) {
   if (EntryTypes.isExclusiveBibLatex(entry.getType())) {
     return Collections.singletonList(
         new IntegrityMessage(
             Localization.lang(
                 "Entry type %0 is only defined for Biblatex but not for BibTeX", entry.getType()),
             entry,
             "bibtexkey"));
   }
   return Collections.emptyList();
 }