import typing


def flatten_list(list_of_lists: typing.List[typing.List[typing.Any]]) -> typing.List[typing.Any]:
    """flatten a 2 level deep nested list into a single list

    Parameters
    ----------
    list_of_lists:  typing.List[typing.List[typing.Any]]
        2 level nested list

    Returns
    -------
    typing.List[typing.Any]
        the unrolled list
    """
    return [item for sublist in list_of_lists for item in sublist]