[From string (line 10) ]                       
                                               
@startuml                                      
<style>                                        
.a {                                           
  LineThickness 3                              
  Linecolor red                                
}                                              
</style>                                       
participant alice                              
alice -> bob : msg                             
alice ->x? <<a>> : red                         
^^^^^                                          
 Syntax Error? (Assumed diagram type: sequence)