code: private int configUpdateInProgress() {
          int retVal;
  
          configUpdatePendingQueueLock.writeLock().lock();
          try {
              retVal = configUpdatesInProgress;
              configUpdatesInProgress++;
          } finally {
              configUpdatePendingQueueLock.writeLock().unlock();
          }
          return retVal;
      }
docs: Bump the number of Configuration updates that we are monitoring.
  
  @return previous number of Configuration updates that we are monitoring.