ul.nav.nav-pills
  - @model.available_tabs.each do |nav_item|
    - if nav_item.display_if.call(@ar_object)
      - if nav_item.custom_action.empty? || (nav_item.custom_action.present? && policy([:cm_admin, @model.name.classify.constantize]).send(:"#{nav_item.custom_action}?"))
        li.nav-item
          - nav_item_action_name = nav_item.custom_action.present? ? nav_item.custom_action : 'show'
          = link_to tab_display_name(nav_item.nav_item_name), cm_admin.send("#{@ar_object.model_name.singular}_#{nav_item_action_name}_path", @ar_object.id), class: "nav-link #{ nav_item_action_name == action_name ? 'active' : ''}"