def vertical(*args, &block)
      if navbar = Bh::Stack.find(Bh::Navbar)
        vertical = Bh::Vertical.new self, *args, &block
        vertical.append_class! :'navbar-header'
        vertical.prepend_html! vertical.toggle_button(navbar.id)
        vertical.render_tag :div
      end
    end
def vertical(*args, &block)
      if navbar = Bh::Stack.find(Bh::Navbar)
        vertical = Bh::Vertical.new self, *args, &block
        vertical.append_class! :'navbar-header'
        vertical.prepend_html! vertical.toggle_button(navbar.id)
        vertical.render_tag :div
      end
    end
Displays the non-collapsable portion of a Bootstrap-styled navbar.
 @see http://getbootstrap.com/components/#navbar
 @return [String] the HTML to display the non-collapsable portion of a
   Bootstrap-styled navbar.
 @overload vertical(content, options = {})
   @param [#to_s] content the non-collapsable content to display in the
     navbar.
   @param [Hash] options the options to pass to the wrapping `<div>`.
 @overload vertical(options = {}, &block)
   @param [Hash] options the options to pass to the wrapping `<div>`.
   @yieldreturn [#to_s] the non-collapsable content to display in the
     navbar.
 @example Display a navbar a non-collapsable links.
   navbar do
     vertical do
       link_to 'Home', '/'
     end
   end