Is a = b?                                                                                                 
                                                                                                                                                                                                   
                                                                                                                                                 yes                                               
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                   Do something                                                                                                                                    
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                     Is d = c?                                                                                   no
                                                                                                                                                                                                   
                                                                                                                                                 yes                                               
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                TestNode                                                                                           
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                                                                                                                   
                                                                                                     Clean up