private static PsiExpression getArg(PsiElement element) {
    final PsiExpressionList argumentList = ((PsiCall)element.getParent()).getArgumentList();
    LOG.assertTrue(argumentList != null);
    final PsiExpression[] args = argumentList.getExpressions();
    LOG.assertTrue(args.length == 1);
    return args[0];
  }
private static PsiExpression getArg(PsiElement element)