lib/rack/insight/views/headers_fragment.html.erb
<li id="rack-insight_disable_button">[X]</li>
<li id="rack-insight_debug_button">Rack::Insight (req# <span id="request_id"><%= request_id %></span>)</li>
<% panels.each do |panel| %>
<li>
<% begin %>
<% if panel.has_content? %>
<a href="#" class="<%= panel.camelized_name %>Panel">
<%= panel.heading_for_request(request_id) %>
</a>
<% else %>
<a href="javascript:void(0);">
<%= panel.heading_for_request(request_id) %>
</a>
<% end %>
<% rescue StandardError => ex %>
Err5: <%= panel.name rescue "xxx" %>
<!-- Panel: <%= panel.inspect %> -->
<!-- <%= ([ex.class.name, ex.message] + ex.backtrace).join("\n") %> -->
<% end %>
</li>
<% end %>