def METHOD_NAME(specviz2d_helper):
    fn = download_file('https://stsci.box.com/shared/static/e3n30l8vr7hkpnuy7g0t8c5nbl70632b.fits', cache=True)  # noqa
    with fits.open(fn) as hdulist:
        specviz2d_helper.load_data(spectrum_2d=hdulist, ext=2, transpose=True)
    dc_0 = specviz2d_helper.app.data_collection[0]
    assert dc_0.get_component('flux').shape == (3416, 29)