@NotNull
    @Override
    protected Control createPreferenceContent(@NotNull Composite parent) {
        FontData fontData = getPrefFontData();
        String defWidth = getDefaultWidth();
        preferences = new HexPreferencesManager(fontData, defWidth);

        return preferences.createPreferencesPart(parent);
    }
@see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite)
plugins/org.jkiss.dbeaver.ui.editors.hex/src/org/jkiss/dbeaver/ui/editors/binary/pref/HexPreferencesPage.java