如何在Flutter中嵌入水印(文本或图像)

import 'package:flutter/material.dart';
import 'package:flutter_watermark/flutter_watermark.dart';

class WatermarkPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Watermark Example'),
      ),
      body: Center(
        child: Watermark.text(
          child: Image.asset('assets/image.png'),
          text: 'Watermark Text',
          textStyle: TextStyle(
            fontSize: 20,
            color: Colors.grey,
            fontWeight: FontWeight.bold,
          ),
          position: WatermarkPosition.bottomRight,
        ),
      ),
    );
  }
}