def METHOD_NAME():
    ts2_h1 = db.get_halo("sim/ts2/1")
    reconstructed = ts2_h1.get_objects("dummy_histogram")[0].get_data_with_reassembly_options('sum')
    manual_reconstruction = ts2_h1['dummy_histogram']
    added_bit = tangos.get_halo("sim/ts1/2")['dummy_histogram']
    manual_reconstruction[:len(added_bit)]+=added_bit
    npt.assert_almost_equal(reconstructed, manual_reconstruction)