How to use the maup.adjacencies.IslandWarning function in maup

def test_warns_for_islands(self, four_square_grid):
        with pytest.warns(IslandWarning):
            adjacencies(four_square_grid.loc[[0, 3]])

if warn_for_overlaps:
        overlaps = inters[inters.area > 0]
        if len(overlaps) > 0:
            warnings.warn(
                "Found overlapping polygons while computing adjacencies.\n"
                "This could be evidence of topological problems.\n"
                "Indices of overlaps: {}".format(set(overlaps.index)),
                OverlapWarning,
            )

    if warn_for_islands:
        islands = set(geometries.index) - set(i for pair in inters.index for i in pair)
        if len(islands) > 0:
            warnings.warn(
                "Found islands.\n" "Indices of islands: {}".format(islands),
                IslandWarning,
            )

    return inters