docs: private static boolean trimProcQuotas(ZooKeeper zk, String path)
              throws KeeperException, IOException, InterruptedException {
          if (Quotas.quotaZookeeper.equals(path)) {
              return true;
          }
          List<String> children = zk.getChildren(path, false);
          if (children.size() == 0) {
              zk.delete(path, -1);
              String parent = path.substring(0, path.lastIndexOf('/'));
              return trimProcQuotas(zk, parent);
          } else {
              return true;
          }
      }