[From string (line 15) ]                        
                                                
@startuml                                       
<style>                                         
note {                                          
  FontSize 10                                   
  BackGroundColor #fff                          
  .green {                                      
        BackgroundColor green                   
   }                                            
}                                               
</style>                                        
                                                
node n                                          
file f                                          
note<<green>> left of n: note that is green     
^^^^^                                           
 Syntax Error? (Assumed diagram type: component)