def METHOD_NAME(
    real_assemblies_montblanc,
    real_tracklets_montblanc,
):
    tracklets_ref = real_tracklets_montblanc.copy()
    _ = tracklets_ref.pop("header", None)
    tracklets = dict()
    tracklets["single"] = real_assemblies_montblanc[1]
    mot_tracker = trackingutils.SORTEllipse(1, 1, 0.6)
    for ind, assemblies in real_assemblies_montblanc[0].items():
        animals = np.stack([ass.data for ass in assemblies])
        trackers = mot_tracker.track(animals[..., :2])
        trackingutils.fill_tracklets(tracklets, trackers, animals, ind)
    assert len(tracklets) == len(tracklets_ref)
    assert [len(tracklet) for tracklet in tracklets.values()] == [
        len(tracklet) for tracklet in tracklets_ref.values()
    ]
    for k, assemblies in tracklets.items():
        ref = tracklets_ref[k]
        for ind, data in assemblies.items():
            frame = f"frame{str(ind).zfill(3)}" if k != "single" else ind
            np.testing.assert_equal(data, ref[frame])