How to use the nwbwidgets.base function in nwbwidgets

ax.set_ylabel('x ({})'.format(unit))
        else:
            ax.set_ylabel('x')

    else:
        fig, axs = plt.subplots(ndims, 1, sharex=True)

        for i, (ax, dim_label) in enumerate(zip(axs, ('x', 'y', 'z'))):
            ax.plot(tt, data[:, i], **kwargs)
            if unit:
                ax.set_ylabel(dim_label + ' ({})'.format(unit))
            else:
                ax.set_ylabel(dim_label)
        ax.set_xlabel('t (sec)')

    return widgets.HBox([text_widget, base.fig2widget(fig)])

return ElectrodesWidget(node)
    return render_dataframe(node)


default_neurodata_vis_spec = {
    pynwb.NWBFile: file.show_nwbfile,
    SweepSequences: icephys.show_sweep_sequences,
    pynwb.behavior.BehavioralEvents: behavior.show_behavioral_events,
    pynwb.ecephys.LFP: ecephys.show_lfp,
    pynwb.misc.Units: OrderedDict({
        'Session Raster': misc.RasterWidget,
        'Grouped PSTH': misc.PSTHWidget,
        'Raster Grid': misc.RasterGridWidget,
        'table': show_dynamic_table}),
    pynwb.misc.DecompositionSeries: misc.show_decomposition_series,
    pynwb.file.Subject: base.show_fields,
    pynwb.ophys.ImagingPlane: base.show_fields,
    pynwb.ecephys.SpikeEventSeries: ecephys.show_spike_event_series,
    pynwb.ophys.ImageSegmentation: ophys.show_image_segmentation,
    pynwb.ophys.TwoPhotonSeries: ophys.show_two_photon_series,
    ndx_grayscalevolume.GrayscaleVolume: ophys.show_grayscale_volume,
    pynwb.ophys.PlaneSegmentation: ophys.show_plane_segmentation,
    pynwb.ophys.DfOverF: ophys.show_df_over_f,
    pynwb.ophys.RoiResponseSeries: ophys.RoiResponseSeriesWidget,
    pynwb.misc.AnnotationSeries: OrderedDict({
        'text': base.show_text_fields,
        'times': misc.show_annotations}),
    pynwb.core.LabelledDict: base.dict2accordion,
    pynwb.ProcessingModule: base.processing_module,
    hdmf.common.DynamicTable: show_dynamic_table,
    pynwb.ecephys.ElectricalSeries: ecephys.ElectricalSeriesWidget,
    pynwb.behavior.Position: behavior.show_position,