code: void removeFromInodeMap(List<INode> inodes) {
      if (inodes != null) {
        for (INode inode : inodes) {
          if (inode != null) {
            inodeMap.remove(inode);
          }
        }
      }
    }
docs: Remove inodes from inodeMap
  Not thread safe, needs lock on operations
  @param removedINodes inodes to be removed