@Override
 public int compareTo(SagaMethodMessageHandler o) {
   if (this.handlerMethod == null && o.handlerMethod == null) {
     return 0;
   } else if (this.handlerMethod == null) {
     return -1;
   } else if (o.handlerMethod == null) {
     return 1;
   }
   return handlerMethod.compareTo(o.handlerMethod);
 }