code: public boolean releaseLargeTempTableBlock(long siteId, long blockCounter) {
          LargeBlockTask task = LargeBlockTask.getReleaseTask(new BlockId(siteId, blockCounter));
          return executeLargeBlockTaskSynchronously(task);
      }
docs: Delete the block with the given id from disk.
  
  @param siteId        The originating site id of the block to release
  @param blockCounter  The serial number of the block to release
  @return True if the operation succeeded, and false otherwise