code: def GetFileEntryByPathSpec(self, path_spec):
      
      return encrypted_stream_file_entry.EncryptedStreamFileEntry(
          self._resolver_context, self, path_spec, is_root=True, is_virtual=True)
docs: Retrieves a file entry for a path specification.
  
      Args:
        path_spec (PathSpec): a path specification.
  
      Returns:
        EncryptedStreamFileEntry: a file entry or None if not available.