children: <Widget>[
                      FormBuilder(
                        key: _fbKey,
                        autovalidate: true,
                        child: Column(
                          children: <Widget>[
                            FormBuilderDropdown(
                              attribute: "value",
                              decoration: InputDecoration(
                              labelText: "Choose something?"),
                              hint: Text('Select Option'),
                              validators: [FormBuilderValidators.required()],
                              items: user.option.map((v) {
                                return DropdownMenuItem(
                                    value: v,
                                    child: ListTile(
                                      leading: Image.asset(
                                        'assets/img/image.png',
                                        width: 50,
                                        height: 50,
                                      ),
                                      title: Text("${v.option}"),
                                    ));

                              }).toList(),
                            ),
                          ],
                        ),
                       // if v.option == "A" is selected here build Widget A()
                       // if v.option == "B" is selected here build Widget B()
                       // if v.option == "C" is selected here build Widget C()
                      ),