h1 Application emails
ul.list-unstyled
  - @preview_class_names.each do |m|
    li.col-lg-6.col-sm-6
      h2= m.underscore.sub(/(_mailer)?_preview$/, '').humanize
      ul.list-group
        - m.constantize.instance_methods(false).map(&:to_s).each do |method|
          li.list-group-item
            a href=rails_email_preview.email_url(mail_class: m.to_s.underscore, mail_action: method.to_s)
              = method.to_s.humanize