title: Flutter Awesome Notification couldn't bind a method to action button
body: <p>I'm developing an app which needs to answer the notifications. I can display the button when I received the notification. However, I couldn't bind any method to it. Here is my code:</p>
  <pre><code>Future&lt;void&gt; firebaseMessagingBackgroundHandler(RemoteMessage message)  async {
    await Firebase.initializeApp();
      AwesomeNotifications().createNotification(
            content: NotificationContent(
                id: 10,
                channelKey: 'basic_channel',
                title: 'Simple Notification',
                body: 'Simple body'),
            actionButtons: [
              NotificationActionButton(
                  label: 'TEST',
                  enabled: true,
                  buttonType: ActionButtonType.Default,
                  key: 'test',
                  )
            ]);
      print(&quot;Background message service&quot;);
    }
  </code></pre>
  <p>Thank you for your helps!</p>