我在这个项目上工作，我需要有一些API的单选按钮，我需要单选按钮被选择一次多次。例如：假设有4个选项，用户可以一次选择多个选项。我该怎么做？如何让单选按钮同时选择多个值？

Row(
                                  children: [
                                    Expanded(
                                      flex: 2,
                                      child: Containers(
                                        height: size.height,
                                        child: Radio(
                                          activeColor: radioButtonItem ==
                                                  _data[index].name
                                              ? Colors.white
                                              : const Color.fromRGBO(
                                                  44, 39, 36, 0.75),
                                          value: _data[index].id,
                                          groupValue: id,
                                          onChanged: (val) {
                                            setState(
                                              () {
                                                radioButtonItem =
                                                    _data[index].name;
                                                id = _data[index].id;
                                              },
                                            );
                                          },
                                        ),
                                      ),
                                    ),
                                    Expanded(
                                      flex: 5,
                                      child: Containers(
                                        height: size.height,
                                        child: Column(
                                          crossAxisAlignment:
                                              CrossAxisAlignment.start,
                                          mainAxisAlignment:
                                              MainAxisAlignment.center,
                                          children: [
                                            Texts(
                                              texts: _data[index].name,
                                              fontSize: 16.sp,
                                              fontWeight: FontWeight.w500,
                                              color: radioButtonItem ==
                                                      _data[index].name
                                                  ? Colors.white
                                                  : const Color.fromRGBO(
                                                      44, 39, 36, 0.75),
                                              textAlign: TextAlign.left,
                                            ),
                                          ],
                                        ),
                                      ),
                                    )
                                  ],
                                ),