foo1                                                                                                                              
                                                                                                                                                       
                                                                                                                                                       
                                                    OK You can put text on arrows                                                                      
                                                    also be on several lines                                                                           
                                                    and                                                    very                                 long...
                                                                                                                                                       
                                                                                                                                                       
                                                                                                                                                       
                     foo2                                                                                                                              
                                                                                                                                                       
                                                                                                                                                       
                                                    Error You can put text on arrows                                                                   
                                                    also be on several lines                                                                           
                                                                                                                                                       
                                                    and                                                    very                                 long...
                                                                                                                                                       
                                                                                                                                                       
                                                                                                                                                       
                     foo5