title: Permanent Persistent Bottom sheet flutter
body: <p>I want my bottom sheet to stay on the screen till I close it from a code. Normally the bottom sheet can be closed by pressing back button(device or appbar) or even just by a downward gesture. How can I disable that?</p>
  
  <pre><code>_scaffoldKey.currentState
          .showBottomSheet&lt;Null&gt;((BuildContext context) {
        final ThemeData themeData = Theme.of(context);
        return new ControlBottom(
          songName: songName,
          url: url,
          play: play,
          pause: pause,
          state: test,
          themeData: themeData,
        );
      }).closed.whenComplete((){
  
      });
  </code></pre>
  
  <p>Control botton is a different widget.</p>