- cache ['message-train', collectives_cache_key(collective_boxes, box_user)] do
  - unless collective_boxes.empty?
    - collective_boxes.each do |key, boxes|
      - if show[key]
        = dropdown_nav_item "#{key.to_s.humanize} #{badge(total_unread_count[key].to_s) unless total_unread_count[key] == 0}".html_safe, '#' do
          - boxes.each do |box|
            = collective_nav_item box, box_user