title: Flutter:- show BottomSheet transparency
body: <p>I want to open a showBottomSheet. here is my code which working fine, I am able to open ButtomSheet, but it's not giving transparency effect. that I could see behind of this sheet, even I also tried with Opacity which also not working.</p>
  
  <pre><code> showBottomSheet(
              context: context,
              builder: (context) {
                return Opacity(
                  opacity: .1,
                  child: Container(
                    height: 400.0,
                    color: Colors.transparent,
                  ),
                );
              });
  </code></pre>