code: def GetRootFileEntry(self):
      
      path_spec = vshadow_path_spec.VShadowPathSpec(
          location=self.LOCATION_ROOT, parent=self._path_spec.parent)
      return self.GetFileEntryByPathSpec(path_spec)
docs: Retrieves the root file entry.
  
      Returns:
        VShadowFileEntry: file entry or None if not available.