button floating

floatingActionButton: Stack(
          children: <Widget>[
            Padding(padding: EdgeInsets.only(left:0),
            child: Align(
              alignment: Alignment.bottomRight,
              child: FloatingActionButton(
                onPressed: () {
                  model.goAnotherView(AbsenViewRoute);
                },
                backgroundColor: bluePrimary,
                child: Icon(
                  Icons.add,
                  color: white,
                )
              ),
            ),
            ),
            Align(
              alignment: Alignment.bottomLeft,
              child: FloatingActionButton(
                onPressed: () {
                  //model.goAnotherView(AbsenViewRoute);
                },
                backgroundColor: Colors.red,
                child: Icon(
                  Icons.add_box,
                  color: white,
                )
              ),
            ),
            Align(
              alignment: Alignment.bottomLeft,
              child: FloatingActionButton(
                onPressed: () {
                  //model.goAnotherView(AbsenViewRoute);
                },
                backgroundColor: Colors.green,
                child: Icon(
                  Icons.add_box,
                  color: white,
                )
              ),
            ),
            Align(
              alignment: Alignment.bottomLeft,
              child: FloatingActionButton(
                onPressed: () {
                  //model.goAnotherView(AbsenViewRoute);
                },
                backgroundColor: Colors.yellow,
                child: Icon(
                  Icons.add_box,
                  color: white,
                )
              ),
            ),
          ]
        ),