RefineryCMS conditional display of menu items

RefineryCMS conditional display of menu items

Tried using refinery with an exiting devise rails app. I was wondering if
it is possible to allow conditional menu items in the top bar based on
user's logged in status?
I see menu refinery partial code as
<%
# Collect the root items.
# ::Refinery::Menu is smart enough to remember all of the items in the
original collection.
if (roots = local_assigns[:roots] || (collection ||=
refinery_menu_pages).roots).present?
dom_id ||= 'menu'
css = [(css || 'menu clearfix')].flatten.join(' ')
hide_children = Refinery::Core.menu_hide_children if hide_children.nil?
-%>
<nav id='<%= dom_id %>' class='<%= css %>'>
<ul>
<%= render :partial => '/refinery/menu_branch', :collection => roots,
:locals => {
:hide_children => hide_children,
:sibling_count => (roots.length - 1),
:menu_levels => local_assigns[:menu_levels],
:apply_css => true #if you don't care about class='first'
class='last' or class='selected' set apply_css to false
for speed.
} -%>
</ul>
</nav>
<% end -%>
and menu_branch refinery partial code as
<%
if !!local_assigns[:apply_css] and (classes =
menu_branch_css(local_assigns)).any?
css = "class='#{classes.join(' ')}'".html_safe
end
-%>
<li<%= ['', css].compact.join(' ').gsub(/\ *$/, '').html_safe %>>
<%= link_to(menu_branch.title, refinery.url_for(menu_branch.url)) -%>
<% if ( (children = menu_branch.children unless hide_children).present? &&
(!local_assigns[:menu_levels] || menu_branch.ancestors.length <
local_assigns[:menu_levels]) ) -%>
<ul class='clearfix'>
<%= render :partial => '/refinery/menu_branch', :collection =>
children,
:locals => {
:apply_css => local_assigns[:apply_css],
:hide_children => !!hide_children,
:menu_levels => local_assigns[:menu_levels]
} -%>
</ul>
<% end -%>
</li>
Not sure how I can allow conditional display of certain menu items.