gistfile1.txt

return Scaffold(
      body: Stack(
        children: <Widget>[
          CustomScrollView(
            slivers: <Widget>[
              SliverAppBar(
                pinned: true,
                leading: Container(),
                expandedHeight: 300.0,
                flexibleSpace: FlexibleSpaceBar(
                  background: Column(
                    children: <Widget>[
                      buildProfileLine(),
                      buildGroupLine(),
                    ],
                  ),
                ),
                bottom: PreferredSize(
                  preferredSize: const Size.fromHeight(44.0),
                  child: buildButtons(),
                ),
              ),
              SliverList(
                delegate: SliverChildListDelegate([
                  buildListView()
                ]),
              )
            ],
          ),
          buildEmergencyButton()
        ],
      ),
    );