private boolean hasKeyBinding(
     DartKeyBindingPersistence persist, String commandName, String keySequence) {
   try {
     Binding bind = persist.findBinding(commandName, null);
     if (bind == null) {
       return false;
     }
     return keySequence.equals(bind.getTriggerSequence().toString());
   } catch (NotDefinedException ex) {
     // fall through
   }
   return false;
 }