@Override
  public void actionPerformed(@NotNull AnActionEvent e) {
    if (! enabled(e)) return;

    final Project project = e.getData(CommonDataKeys.PROJECT);
    final VcsFileRevision revision = e.getData(VcsDataKeys.VCS_FILE_REVISION);
    final VirtualFile revisionVirtualFile = e.getData(VcsDataKeys.VCS_VIRTUAL_FILE);
    SvnMergeSourceDetails.showMe(project, (SvnFileRevision) revision, revisionVirtualFile);
  }
@Override
  public void actionPerformed(@NotNull AnActionEvent e)