@Override
      protected List<VirtualFile> merge() {
        final List<VirtualFile> writable = prepareWritable(myFiles);
        final AbstractVcsHelper vcsHelper = AbstractVcsHelper.getInstance(myVcs.getProject());
        return vcsHelper.showMergeDialog(writable, new SvnMergeProvider(myVcs.getProject()));
      }
@Override
      protected List<VirtualFile> merge()