def METHOD_NAME():
    hierachy_cols = ["col1", "col2"]
    hierarchy_spec = spec_hierarchy_from_list(hierachy_cols)
    assert len(hierarchy_spec) == 3
    assert hierarchy_spec[0] == ["Total"]
    assert hierarchy_spec[1] == ["Total", "col1"]
    assert hierarchy_spec[2] == ["Total", "col1", "col2"]