[From string (line 7) ]                                                                
                                                                                       
@startuml                                                                              
!function note(text)                                                                   
!if (text != "")                                                                       
note right:text                                                                        
!else                                                                                  
!endif                                                                                 
!endfunction                                                                           
^^^^^                                                                                  
 This function does not have any !return directive. Declare it as a procedure instead ?