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