first branch                                                                                                                                                                                                                                                              second branch
                                                                                                                                                                                                                                                                                                                                                                                                              
                                                                                                                                                                                                                                                                                                                                                                                                              
                                                                                                                                                                                                                                                                                                                                                                                                              
                                 first activity                                                                                                                                                                                                                                     second activity