@Override
    public void visitLiteralExpression(@NotNull PsiLiteralExpression expression) {
      if (PsiLiteralUtil.isUnsafeLiteral(expression)) {
        invalidCode = true;
        stopWalking();
      }
      else if (expression.getParent() instanceof PsiExpressionStatement) {
        invalidCode = true;
        stopWalking();
      }
    }
@Override
    public void visitLiteralExpression(@NotNull PsiLiteralExpression expression)