private void doGraphicalDiff(Url sourceURL, Url targetURL) throws VcsException {
    List<Change> changes =
      myVCS.getFactoryFromSettings().createDiffClient().compare(Target.on(sourceURL), Target.on(targetURL));

    showDiffEditorResults(changes, sourceURL.getTail(), targetURL.getTail());
  }
private void doGraphicalDiff(Url sourceURL, Url targetURL)