[From string (line 9) ]                                                                
                                                                                       
@startuml                                                                              
!unquoted function DRAW($x) return %set_variable_value($x, 1)                          
!function noteMember($part, $direction, $class, $member, $note)                        
    !if %variable_exists($part)                                                        
        note $direction of $class::"$member"                                           
            $note                                                                      
        end note                                                                       
    !endif                                                                             
!endfunction                                                                           
^^^^^                                                                                  
 This function does not have any !return directive. Declare it as a procedure instead ?