def METHOD_NAME(items):
    """Verify that the sequence contains only items of type list.
    Parameters
    ----------
    items : sequence
        The items.
    Returns
    -------
    bool
        True if all items in the sequence are of type list.
        False otherwise.
    Examples
    --------
    >>> is_sequence_of_list([[1], [1], [1]])
    True
    """
    return all(isinstance(item, list) for item in items)