SiteNav or SiteHomeNav with template

@BRT.SiteNav(
template:
@<div class="dropdown inner">
    <button class="btn btn-secondary dropdown-toggle btn-block" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    @item.Title Menu
    </button>
    <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
    @foreach(SiteNavHelperExtensions.SiteNavItem nv in item.Children) {
        <a class="dropdown-item" href="/@nv.Friendly" style="text-decoration:none;">@nv.Title</a>
    }
    </div>
</div>)

OR USE:  @BRT.SiteHomeNav()