[From string (line 8) ]                                                                
                                                                                       
@startuml                                                                              
!unquoted function my_Function($arg)                                                   
:myFunction();                                                                         
note right                                                                             
called with                                                                            
$arg                                                                                   
end note                                                                               
!endfunction                                                                           
^^^^^                                                                                  
 This function does not have any !return directive. Declare it as a procedure instead ?