code: public void addBlock(String tierAlias, long blockId, long blockSize, long blockLastAccessTimeMs) {
      UIFileBlockInfo block =
          new UIFileBlockInfo(blockId, blockSize, blockLastAccessTimeMs, tierAlias,
              mAlluxioConfiguration);
      List<UIFileBlockInfo> blocksOnTier = mBlocksOnTier.get(tierAlias);
      if (blocksOnTier == null) {
        blocksOnTier = new ArrayList<>();
        mBlocksOnTier.put(tierAlias, blocksOnTier);
      }
      blocksOnTier.add(block);
  
      Long sizeOnTier = mSizeOnTier.get(tierAlias);
      mSizeOnTier.put(tierAlias, (sizeOnTier == null ? 0L : sizeOnTier) + blockSize);
    }
docs: Adds a block to the file information.
  
  @param tierAlias the tier alias
  @param blockId the block id
  @param blockSize the block size
  @param blockLastAccessTimeMs the last access time (in milliseconds)