code: def GetRootFileEntry(self):
      
      path_spec = sqlite_blob_path_spec.SQLiteBlobPathSpec(
          table_name=self._path_spec.table_name,
          column_name=self._path_spec.column_name,
          parent=self._path_spec.parent)
      return self.GetFileEntryByPathSpec(path_spec)
docs: Retrieves the root file entry.
  
      Returns:
        FileEntry: a file entry or None.