docs: public Collection<Operation> getPostJoinOperations() {
          Collection<Operation> postJoinOps = new LinkedList<>();
          Collection<PostJoinAwareService> services = getServices(PostJoinAwareService.class);
          for (PostJoinAwareService service : services) {
              Operation postJoinOperation = service.getPostJoinOperation();
              if (postJoinOperation != null) {
                  if (postJoinOperation.getPartitionId() >= 0) {
                      logger.severe("Post-join operations should not have partition ID set! Service: "
                              + service + ", Operation: "
                              + postJoinOperation);
                      continue;
                  }
                  postJoinOps.add(postJoinOperation);
              }
          }
          return postJoinOps;
      }