def METHOD_NAME():
    model = get_model(io.StringIO(par))
    toas = pint.simulation.make_fake_toas_uniform(
        54000, 56000, 100, model=model, obs="gbt"
    )
    dmx = model.components["DispersionDMX"].dmx_dm(toas)
    # add in new overlapping DMX
    model.add_DMX_range(54500, 55000, dmx=0, frozen=True)
    newdmx = model.components["DispersionDMX"].dmx_dm(toas)
    assert np.all(dmx == newdmx)