code: @Override
    public void updatePinnedInodes(Set<Long> inodes) {
      LOG.debug("updatePinnedInodes: inodes={}", inodes);
      synchronized (mPinnedInodes) {
        mPinnedInodes.clear();
        mPinnedInodes.addAll(Preconditions.checkNotNull(inodes));
      }
    }
docs: Updates the pinned blocks.
  
  @param inodes a set of ids inodes that are pinned