docs: public void killWorkers(Set<ContainerPlan> containers) {
      for (ContainerPlan container : containers) {
        LOG.log(Level.INFO, "Find and kill container for worker {0}", container.getId());
        Optional<HeronWorker> worker = multiKeyWorkerMap.lookupByWorkerId(container.getId());
        if (worker.isPresent()) {
          LOG.log(Level.INFO, "Killing container {0} for worker {1}",
              new Object[]{worker.get().evaluator.getId(), worker.get().workerId});
          AllocatedEvaluator evaluator = multiKeyWorkerMap.detachEvaluatorAndRemove(worker.get());
          evaluator.close();
        } else {
          LOG.log(Level.WARNING, "Did not find worker for {0}", container.getId());
        }
        containerPlans.remove(container.getId());
      }
    }