@Override
  protected void doOKAction() {
    final ProjectFileIndex index = ProjectRootManager.getInstance(myProject).getFileIndex();
    if (!isValidPath(myPanel.myLinuxIconPath, index, "Linux")) return;
    if (!isValidPath(myPanel.myMacIconPath, index, "Mac")) return;
    if (!isValidPath(myPanel.myWindowsIconPath, index, "Windows")) return;

    super.doOKAction();
  }
@Override
  protected void doOKAction()