yes                             
                                option1                                                                                                                                   
                                                                                                                                                                          
                                                                                                                                                                          
                                                                                                                                                                          
                                                                                                                                                                          
                                                                                                                                                                          
                                option2                                                                                                   yes                             
                                                                                                                                                                          
                                                                                                                                                                          
                                                                                                                                                              do something