[From string (line 18) ]                                  
                                                          
@startuml                                                 
<STYLE>                                                   
note {                                                    
backgroundcolor yellow                                    
}                                                         
</STYLE>                                                  
                                                          
note bottom of MyClass                                    
{{                                                        
digraph G {                                               
    graph [pad=0]                                         
    margin=0                                              
    bgcolor="white"                                       
    node[shape=box; fontsize=12; nodesep=0.1; ranksep=0.1]
    methodOne -> methodTwo                                
}                                                         
}}                                                        
end note                                                  
^^^^^                                                     
 Not known: MyClass