@Override
 public void performCopy(@NotNull DataContext dataContext) {
   List<VcsFullCommitDetails> details =
       VcsLogUtil.collectFirstPackOfLoadedSelectedDetails(myUI.getVcsLog());
   if (!details.isEmpty()) {
     CopyPasteManager.getInstance()
         .setContents(
             new StringSelection(
                 StringUtil.join(
                     details,
                     new Function<VcsFullCommitDetails, String>() {
                       @Override
                       public String fun(VcsFullCommitDetails details) {
                         return details.getSubject();
                       }
                     },
                     "\n")));
   }
 }