public List<String> getResponsesFromOther() {
   if (responsesFromOther == null) {
     responsesFromOther = Collections.emptyList();
   }
   return responsesFromOther;
 }
 public List<String> getFailedResponses() {
   if (failedResponses == null) {
     failedResponses = Collections.emptyList();
   }
   return failedResponses;
 }