Construct File System Root Directory.
Construct from msgpack unpacker.
Append Tree Statistics.
Scan this recursively for a non-diretory file with basename name. TODO Reuse range based algorithm this.tree(depthFirst|breadFirst)
Return true if this is a file system root directory.
Load Contents of this Directory from Disk using DirEntries.
Update Statistics for Sub-File sub with subDent of this Dir.
Content Digest of Tree under this Directory.
Check if this File has been invalidated by dent.
NOTE: Currently not used.
Get Parenting Dirs starting from parent of this upto root. Make this even more lazily evaluted.
Get Parenting Dirs starting from file system root downto containing directory of this.
Dir.