def METHOD_NAME(self) -> str:
    """
    Calls `to_str()` method for all registered statistics of the algorithm and returns
    a sum-up string.
    :return: A representation of the NNCF statistics as a human-readable string.
    """
    pretty_string = "\n\n".join([stats.METHOD_NAME() for stats in self._storage.values()])
    return pretty_string