title: How do I use HTML code in Flutter notifications?
body: <p>I started Flutter exactly today.
  <br>
  I want to use HTML code within Android notifications.
  <br>
  It seems that by setting the DefaultStyleInformation argument to true, HTML can be used, but I don't know how to write the actual code.</p>
  <p>//This is the interface provided.</p>
  <pre><code>/// The default Android notification style.
  class DefaultStyleInformation implements StyleInformation {
    /// Constructs an instance of [DefaultStyleInformation].
    const DefaultStyleInformation(
      this.htmlFormatContent,
      this.htmlFormatTitle,
    );
  
    /// Specifies if formatting should be applied to the content through HTML
    /// markup.
    final bool htmlFormatContent;
  
    /// Specifies if formatting should be applied to the title through HTML
    /// markup.
    final bool htmlFormatTitle;
  }
  </code></pre>
  <p>The following is the code I am writing.
  I feel I need help with the &quot;//here&quot; part.</p>
  <pre><code>import 'package:flutter_local_notifications/flutter_local_notifications.dart';
  import 'dart:io'; 
  
   Future&lt;void&gt; showBigTextNotification() async {
      const styleInformation=DefaultStyleInformation(true,true);
      const NotificationDetails notificationDetails = 
      NotificationDetails(
        android: AndroidNotificationDetails(
         'channel_id',
         'Channel Name',
         importance: Importance.max,
         priority: Priority.high,
         styleInformation: styleInformation
         ),
         iOS: IOSNotificationDetails());
  
      await flutterLocalNotificationsPlugin.show(
        id, 
        Platform.isAndroid? '&lt;b&gt;'${title}'&lt;/b&gt;': title,     // here???
        Platform.isAndroid? '&lt;b&gt;'${content}'&lt;/b&gt;': content, // here???
        payload: 'Destination Screen(Big Text Notification)');
    }
  
  thanks.
  </code></pre>