code: public void addPartition(RedisClusterNode partition) {
  
          LettuceAssert.notNull(partition, "Partition must not be null");
  
          synchronized (partitions) {
              slotCache = EMPTY;
              partitions.add(partition);
          }
      }
docs: Adds a partition <b>without</b> updating the read view/cache.
  
  @param partition the partition