Guesses a container from the current object.

def OpenAsContainer(self):
    """Guesses a container from the current object."""
    if self.IsDirectory():
      return self

    # TODO(user): Add support for more containers here (e.g. registries, zip
    # files etc).
    else:  # For now just guess TSK.
      tsk_handler = self._handlers[rdf_paths.PathSpec.PathType.TSK]
      tsk_pathspec = rdf_paths.PathSpec(
          path="/", pathtype=rdf_paths.PathSpec.PathType.TSK)
      return tsk_handler(
          base_fd=self,
          handlers=self._handlers,
          pathspec=tsk_pathspec,
          progress_callback=self.progress_callback)