def METHOD_NAME(self, address: str, level: StorageLevel):
    """
    Get the customized storage backend info of requested storage backend level at given worker.
    Parameters
    ----------
    address: str
        The worker address.
    level: StorageLevel
        The storage level to fetch the backend info.
    Returns
    -------
    info: dict
        Customized storage backend info dict of all workers. The key is
        worker address, the value is the backend info dict.
    """