docs: public synchronized boolean isComplete(int requestId, boolean remove) {
          if (!operations.containsKey(requestId))
              throw new VoldemortException("No operation with id " + requestId + " found");
  
          if (operations.get(requestId).getStatus().isComplete()) {
              if (logger.isDebugEnabled())
                  logger.debug("Operation complete " + requestId);
  
              if (remove)
                  operations.remove(requestId);
  
              return true;
          }
  
          return false;
      }