code: public void removeTempBlockMeta(TempBlockMeta tempBlockMeta) throws BlockDoesNotExistException {
      Preconditions.checkNotNull(tempBlockMeta, "tempBlockMeta");
      final long blockId = tempBlockMeta.getBlockId();
      final long sessionId = tempBlockMeta.getSessionId();
      TempBlockMeta deletedTempBlockMeta = mBlockIdToTempBlockMap.remove(blockId);
      if (deletedTempBlockMeta == null) {
        throw new BlockDoesNotExistException(ExceptionMessage.BLOCK_META_NOT_FOUND, blockId);
      }
      Set<Long> sessionBlocks = mSessionIdToTempBlockIdsMap.get(sessionId);
      if (sessionBlocks == null || !sessionBlocks.contains(blockId)) {
        throw new BlockDoesNotExistException(ExceptionMessage.BLOCK_NOT_FOUND_FOR_SESSION, blockId,
            mTier.getTierAlias(), sessionId);
      }
      Preconditions.checkState(sessionBlocks.remove(blockId));
      if (sessionBlocks.isEmpty()) {
        mSessionIdToTempBlockIdsMap.remove(sessionId);
      }
      reclaimSpace(tempBlockMeta.getBlockSize(), false);
    }
docs: Removes a temp block from this storage dir.
  
  @param tempBlockMeta the metadata of the temp block to remove
  @throws BlockDoesNotExistException if no temp block is found