title: No Scaffold widget found : Getting exception while opening Bottom Dialog sheet
body: <p>I'm using Scaffold widget but while opening a bottom dialog sheet I'm getting this exception</p>
  
  <pre><code>@override
  Widget build(BuildContext context) {
  
  return Scaffold(
    appBar: AppBar(
      title: Text("Calendar"),
    ),
    body: SafeArea(
    .......
    .......
  
      child: GestureDetector(
                          onTap: (){
                            //getting exception here
                            showBottomSheet(
                                context: context,
                                builder: (context) =&gt; Container(
                                  color: Colors.red,
                                ));
                          },
  </code></pre>
  
  <p>I'm stuck on this code, it'll be very helpful if someone can give any suggestion. Thank you.</p>