code: @Override
      public void addLinkOperationId(String operationId, String location) {
          if (linkOperationIds.containsKey(operationId)) {
              linkOperationIds.get(operationId).add(location);
          } else {
              Set<String> locations = new HashSet<String>();
              locations.add(location);
              linkOperationIds.put(operationId, locations);
          }
      }
docs: {@inheritDoc}