anchor.diff:                  btn.state('open-webgl');
                 }
               }],
  -        }).addTo(reader);
  +        })
  +        toggle.addTo(reader);
           <% end %>
   
           // Database
  
positive.code: 
          // close panel function
          var close_panel = function() {
  
            var $panel = $('.special-panel');
            if ($panel.length) {
              $('.special-panel').hide();
  
negative.code: 
          }, true);
  
          var toggle = cozy.control.widget.toggle({
            region: 'top.toolbar.left',
            template: '<button class="button--sm" id="webgl" data-toggle="button" aria-label="3D Model">3D Model</button>',
            states: [{
  