class WizardPanel2 implements WizardDescriptor.Panel {

    /**
     * The visual component that displays this panel. If you need to access the component from this class, just use getComponent().
     */
    private final WizardVisualPanel2 component;
    private final AbstractImporterSpreadsheet importer;
    private final Set<ChangeListener> listeners = new HashSet<>(1); // or can use ChangeSupport in NB 6.0

    WizardPanel2(AbstractImporterSpreadsheet importer) {
        this.importer = importer;
        this.component = new WizardVisualPanel2(importer, this);
    }

    // Get the visual component for the panel. In this template, the component
    // is kept separate. This can be more efficient: if the wizard is created
    // but never displayed, or not all panels are displayed, it is better to
    // create only those which really need to be visible.
    @Override
    public Component getComponent() {
        return component;
    }

    @Override
    public HelpCtx getHelp() {
        // Show no Help button for this panel:
        return HelpCtx.DEFAULT_HELP;
        // If you have context help:
        // return new HelpCtx(SampleWizardPanel1.class);
    }

    @Override
    public boolean isValid() {
        return true;
    }

    @Override
    public final void addChangeListener(ChangeListener l) {
        synchronized (listeners) {
            listeners.add(l);
        }
    }

    @Override
    public final void removeChangeListener(ChangeListener l) {
        synchronized (listeners) {
            listeners.remove(l);
        }
    }

    protected final void fireChangeEvent() {
        Iterator<ChangeListener> it;
        synchronized (listeners) {
            it = new HashSet<>(listeners).iterator();
        }
        ChangeEvent ev = new ChangeEvent(this);
        while (it.hasNext()) {
            it.next().stateChanged(ev);
        }
    }

    // You can use a settings object to keep track of state. Normally the
    // settings object will be the WizardDescriptor, so you can use
    // WizardDescriptor.getProperty & putProperty to store information entered
    // by the user.
    @Override
    public void readSettings(Object settings) {
        component.reloadSettings();
    }

    @Override
    public void storeSettings(Object settings) {<FILL_FUNCTION_BODY>}
}

        String[] columnsToImport = component.getColumnsToImport();
        Class[] columnTypes = component.getColumnsToImportTypes();

        Map<String, Class> columnsClasses = new HashMap<>();
        for (int i = 0; i < columnsToImport.length; i++) {
            columnsClasses.put(columnsToImport[i], columnTypes[i]);
        }

        importer.setColumnsClasses(columnsClasses);
        importer.setTimeRepresentation(component.getSelectedTimeRepresentation());
    
<no_super_class>