def METHOD_NAME(self, data_keys: List[str], fetch_only: bool = False) -> List:
    """
    Get result of chunks.
    Parameters
    ----------
    data_keys : list
        Data keys.
    fetch_only : bool
        If fetch_only, only fetch data but not return.
    Returns
    -------
    results : list
        Result of chunks if not fetch_only, else return None
    """