private void initNavigationDrawer(WorkbenchBuilder builder) {
        if (builder.navigationDrawerItems != null) {
            navigationDrawerItems.addAll(builder.navigationDrawerItems);
        }
        initNavigationDrawer(builder.navigationDrawer);
    }
Constructor for WorkbenchFX by using the {@link WorkbenchBuilder}.

@param builder to use for the setup
workbenchfx-core/src/main/java/com/dlsc/workbenchfx/Workbench.java