code: public String getRunningFlowIds() {
      final List<Integer> allIds = new ArrayList<>();
      getRunningFlowsIdsHelper(allIds, this.queuedFlows.getAllEntries());
      getRunningFlowsIdsHelper(allIds, this.runningExecutions.get().values());
      Collections.sort(allIds);
      return allIds.toString();
    }
docs: Get execution Ids of all running (unfinished) flows