code: private static void setTimeout(final Operation op, final boolean isTimeout) {
      Logger logger = LoggerFactory.getLogger(MemcachedConnection.class);
  
      try {
        if (op == null || op.isTimedOutUnsent()) {
          return;
        }
  
        MemcachedNode node = op.getHandlingNode();
        if (node != null) {
          node.setContinuousTimeout(isTimeout);
        }
      } catch (Exception e) {
        logger.error(e.getMessage());
      }
    }
docs: Set the continuous timeout on an operation.
  
  Ignore operations which have no handling nodes set yet (which may happen before nodes are properly
  authenticated).
  
  @param op the operation to use.
  @param isTimeout is timed out or not.