code: public void commitBlockSynchronization(Block block,
        long newgenerationstamp, long newlength,
        boolean closeFile, boolean deleteblock, DatanodeID[] newtargets
        ) throws IOException {
      namesystem.commitBlockSynchronization(block,
          newgenerationstamp, newlength, closeFile, deleteblock, newtargets);
    }
docs: {@inheritDoc}