title: Background text in a Flutter list
body: <p>I am looking for a quick alternative to indicate that the list is blank.</p>
  <p>Something quick and easy occurs to me that would be to show a text that always says that it is blank... and when the list has an element, said element is placed above the text making it hide.</p>
  <p>That is, the text will be behind the list.</p>
  <p>Any solution?</p>
  <p>My example code is this:
  <a href="https://pub.dev/packages/flutter_blue/example" rel="nofollow noreferrer">https://pub.dev/packages/flutter_blue/example</a></p>
  <pre><code>             StreamBuilder&lt;List&lt;ScanResult&gt;&gt;(
                  stream: FlutterBlue.instance.scanResults,
                  initialData: [],
                  builder: (c, snapshot) =&gt; Column(
                    children: snapshot.data!
                        .where((r) =&gt; r.device.name != '')
                        .map(
                          (r) =&gt; ScanResultTile(
                            result: r,
                            onTap: () =&gt; Navigator.of(context)
                                .push(MaterialPageRoute(builder: (context) {
                              r.device.connect();
                              return DeviceScreen(device: r.device);
                            })),
                          ),
                        )
                        .toList(),
                  ),
                ),
  </code></pre>